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Maximizing Battery Life

What do you guys do to maximize your battery life? I just can't seem to get decent life. Average is probably 5 hours with heavy usage.
Any recommendations?
Sorry if there is already a thread, I don't have a computer right now and I don't think I can search on tapatalk.
Thanks in advance.
Sent from my Nexus S 4G

The usual - brightness as low as you can stand, radios not in use turned off, screen timeout 15 seconds, 200-1400 conservative governor in SetCPU.
Search AutoKiller in the market -- choose "optimal" profile, so far has given me an extra two hours today over what I got yesterday.

5h of heavy use is good already.
You can tweak your idle batt life, 2g-only, undervolted kernel, avoiding power hungry rom.

Idle battery life is just amazing with stock... just test it over night, 6hrs get 2/3% for me.
I can get 30hrs with 4hrs with screen on, the screen is the key here, i can get 5hrs with 4hrs with screen on too. ;o)
Sent from my Nexus S using XDA App

thiagodark said:
Idle battery life is just amazing with stock... just test it over night, 6hrs get 2/3% for me.
I can get 30hrs with 4hrs with screen on, the screen is the key here, i can get 5hrs with 4hrs with screen on too. ;o)
Sent from my Nexus S using XDA App
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Try a kernel that is made to optimise batt life with display active, like the XTEUV92 Trinity kernel.

rentaric said:
Try a kernel that is made to optimise batt life with display active, like the XTEUV92 Trinity kernel.
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I tried almost every single combination of rom + kernel. And for me, pure stock has the best battery life, by far.
But i'm getting bored and should flash something... )
Ps: afaik trinity doesnt work with stock. Did it change?
Sent from my Nexus S using XDA App

thiagodark said:
I tried almost every single combination of rom + kernel. And for me, pure stock has the best battery life, by far.
But i'm getting bored and should flash something... )
Ps: afaik trinity doesnt work with stock. Did it change?
Sent from my Nexus S using XDA App
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See my signature, stock (rooted and removed soom Google apps) with Trinity, works together just fine

How would you define "heavy" usage?
Also, what does your "battery use" stats say? (Settings - About Phone - Battery Use)
5 hours of truly heavy usage (online gaming, for instance) is actually to be expected.

rentaric said:
See my signature, stock (rooted and removed soom Google apps) with Trinity, works together just fine
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i'm using the same stock 2.3.4 as your signature and tried the morfic kernel from yours, but got no lock at all, freezes and reboots...
that's a little strange for me, first time i see it in my device... =o\\

johnbibbs said:
What do you guys do to maximize your battery life? I just can't seem to get decent life. Average is probably 5 hours with heavy usage.
Any recommendations?
Sorry if there is already a thread, I don't have a computer right now and I don't think I can search on tapatalk.
Thanks in advance.
Sent from my Nexus S 4G
Click to expand...
Click to collapse
You can create a custom prl setting. Turn wifi to never sleep when you're at home... Have the prl to auto *CDMA or GSM* Which ever your network is on. (This goes to all Nexus S. users). So you have wifi on with a signal and 3g off. The phone stays in 2g for calls and uses wifi for data. Turn off google location services while your at home, turn off roaming, turn all of that off. I get about 13 hours of battery life with heavy usage. People think wifi drains your battery but it doesn't if you have mobile data turned off. When you have 3g turned on it's constantly searching for a better connection. If you have wifi on and a strong connection it isn't constantly polling.

are there any charging habits that would help prolong battery life? I usually just charge my phone every night cause, if I remember correctly, these batteries don't have a memory or anything. anyone know if that is the smartest thing to do?

hoponpop said:
are there any charging habits that would help prolong battery life? I usually just charge my phone every night cause, if I remember correctly, these batteries don't have a memory or anything. anyone know if that is the smartest thing to do?
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I hope you don't mean overnight. I don't know if phones have auto-cutoff feature (a la laptops), but it's safer just not to charge overnight.
I personally use an extension that has a timer built-in. Nifty. Set the timer, plug the phone in, it will automatically start and stop the charging at the predetermined times. I usually time the charging to end right before I wake up, so the battery doesn't stay fully charged for too long. I heard batteries corrode faster when they're fully charged.
When my battery life starts getting shorter than usual, I let them drain until the phone turns off automatically (well I actually try not to get to that point, but seldom succeeded ), and as soon as possible charge it until full.
Usually the battery holds longer then. It has something to do with teaching the battery about the true empty and true full.. or something.....
AFAIK. CMIIW.

doesn't the nexus s have a built in cut-off feature so it will only charge to 95% though? I figure that would take care of the full charge issue. i'm also not sure if lithium ion batteries have a memory, but you could always reset the battery stats if you're on root to compensate for the whole draining and fully charging thing.

hoponpop said:
doesn't the nexus s have a built in cut-off feature so it will only charge to 95% though? I figure that would take care of the full charge issue. i'm also not sure if lithium ion batteries have a memory, but you could always reset the battery stats if you're on root to compensate for the whole draining and fully charging thing.
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Battery stats! That's the word I was looking for No I wasn't referring to the memory effect
I don't know what would happen when the cut-off feature kicks up. My Nexus S still shows a charging icon even a while after full, so I don't wanna risk it.
The best way is by touching the charger unit after a while and see if it's warm/hot. If it is, it's still charging. But you gotta give it time to cool down first (after it's finished charging) Haven't gotten around to it, though. Always forgot to check the charger

bprabawabr said:
Battery stats! That's the word I was looking for No I wasn't referring to the memory effect
I don't know what would happen when the cut-off feature kicks up. My Nexus S still shows a charging icon even a while after full, so I don't wanna risk it.
The best way is by touching the charger unit after a while and see if it's warm/hot. If it is, it's still charging. But you gotta give it time to cool down first (after it's finished charging) Haven't gotten around to it, though. Always forgot to check the charger
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lol, I know that my phone for sure won't charge to 100% from watching it, so even after a night of charging it's still at 95%. I've read a few explanations on this forum about the whole not fully charging thing too, so i'm pretty sure that it's like that on purpose.

[Q] Wifi drains battery

Hi,
just got my brand new Transformer Infinity today and I'm pretty disappointed with battery life - without dock it lasts something between 5 and 6 hours while watching youtube and browsing web and that's not much more than my HTC One X. I found out that wifi drains more battery than the screen - 40%, which is pretty weird, because I'm sitting right next to the router and wifi signal is always stronger than -50dB. Have someone experienced something similar?
Battery stats are here: http :// db.tt/TSx6RHtB (please remove spaces, I'm new to the forums, so cannot post links yet).

giedriusc said:
Hi,
just got my brand new Transformer Infinity today and I'm pretty disappointed with battery life - without dock it lasts something between 5 and 6 hours while watching youtube and browsing web and that's not much more than my HTC One X. I found out that wifi drains more battery than the screen - 40%, which is pretty weird, because I'm sitting right next to the router and wifi signal is always stronger than -50dB. Have someone experienced something similar?
Battery stats are here: http :// db.tt/TSx6RHtB (please remove spaces, I'm new to the forums, so cannot post links yet).
Click to expand...
Click to collapse
It's only a stat, doesn't mean that WiFi *drains* your battery..

giedriusc said:
Hi,
just got my brand new Transformer Infinity today and I'm pretty disappointed with battery life - without dock it lasts something between 5 and 6 hours while watching youtube and browsing web and that's not much more than my HTC One X. I found out that wifi drains more battery than the screen - 40%, which is pretty weird, because I'm sitting right next to the router and wifi signal is always stronger than -50dB. Have someone experienced something similar?
Battery stats are here: http :// db.tt/TSx6RHtB (please remove spaces, I'm new to the forums, so cannot post links yet).
Click to expand...
Click to collapse
Same as the prime. Wifi doesn't drain your battery, it's just miss calculated. What drains your battery is the high res screen
Sent from my GT-I9300 using xda premium

josuetenista said:
Same as the prime. Wifi doesn't drain your battery, it's just miss calculated. What drains your battery is the high res screen
Sent from my GT-I9300 using xda premium
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Click to collapse
Is there a way to check if it's miss calculated or if there is something wrong with wifi module? And if it's actually miss calculated, shouldn't Asus repair it to make sure it is calculated correctly?

your argument might have more merit if you did a test with the wifi always on for a period of time vs without it on.

denniegst said:
your argument might have more merit if you did a test with the wifi always on for a period of time vs without it on.
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Click to collapse
I tried to turn off wifi for a couple of minutes, battery stats show wifi consumption 0. After turning wifi on, wifi battery consumption goes very fast to 30 and later to more than 40%.

giedriusc said:
I tried to turn off wifi for a couple of minutes, battery stats show wifi consumption 0. After turning wifi on, wifi battery consumption goes very fast to 30 and later to more than 40%.
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Click to collapse
Since it might be miscalculated that could be wrong. Try watching a movie with another one of similar length without wifi. Afterwards compare battery percentage.

The battery needs a few charge and discharge cycles before you will start to see more meaningful reports. Don't go around and unnerve people by posting about battery life when you cannot possible say anything about that particular issue right now. Let it settle in for a bit. Please.

Monoquark said:
Since it might be miscalculated that could be wrong. Try watching a movie with another one of similar length without wifi. Afterwards compare battery percentage.
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Click to collapse
Good idea, thanks, I'll try that.

MartyHulskemper said:
The battery needs a few charge and discharge cycles before you will start to see more meaningful reports.
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Click to collapse
That's one of the many myths about lithium-ion batteries.
MartyHulskemper said:
Don't go around and unnerve people by posting about battery life when you cannot possible say anything about that particular issue right now. Let it settle in for a bit. Please.
Click to expand...
Click to collapse

No, it's not. Li-Ion batteries have hysteresis as well, and the circuitry needs some start and end points to calibrate itself. I would agree that in some cases, like in my SGS2, specific hardware is used that doesn't need as much info as other pieces do, but generally speaking, you can't expect full potential out of the box.
Posted for reference. You can keep believing in your myth busting capabilities; I do not have the illusion I can convince you otherwise.

MartyHulskemper said:
No, it's not. Li-Ion batteries have hysteresis as well, and the circuitry needs some start and end points to calibrate itself. I would agree that in some cases, like in my SGS2, specific hardware is used that doesn't need as much info as other pieces do, but generally speaking, you can't expect full potential out of the box.
Posted for reference. You can keep believing in your myth busting capabilities; I do not have the illusion I can convince you otherwise.
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I agree. As an SGS2 owner myself, I know that when a battery is first used, or removed and put back in, it takes the device a few cycles to properly calibrate the battery gauge to have accurate results. I imagine this is the norm across other devices as well.

phonic said:
I agree. As an SGS2 owner myself, I know that when a battery is first used, or removed and put back in, it takes the device a few cycles to properly calibrate the battery gauge to have accurate results. I imagine this is the norm across other devices as well.
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Never experienced anything like that since Li-ion batteries came into production.
Btw, just did video tests with wifi on and off, there is almost no difference in battery usage (about 15% per hour with brightness about 50% and IPS+ off), so it seems the battery readings are wrong.
Also I found out today, that auto brightness does not work - stays at maximum level if you go into dark room from bright place forever, exactly the same problem someone experiences with earlier Transformer models. Does auto brightness work OK on your Infinity?

giedriusc said:
Never experienced anything like that since Li-ion batteries came into production.
Btw, just did video tests with wifi on and off, there is almost no difference in battery usage (about 15% per hour with brightness about 50% and IPS+ off), so it seems the battery readings are wrong.
Also I found out today, that auto brightness does not work - stays at maximum level if you go into dark room from bright place forever, exactly the same problem someone experiences with earlier Transformer models. Does auto brightness work OK on your Infinity?
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Auto brightness is buggy here also. Have to control brightness manually....

giedriusc said:
Never experienced anything like that since Li-ion batteries came into production.
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Well, you can't change the laws of physics.
Btw, just did video tests with wifi on and off, there is almost no difference in battery usage (about 15% per hour with brightness about 50% and IPS+ off), so it seems the battery readings are wrong.
Also I found out today, that auto brightness does not work - stays at maximum level if you go into dark room from bright place forever, exactly the same problem someone experiences with earlier Transformer models. Does auto brightness work OK on your Infinity?
Click to expand...
Click to collapse
My specimen does the same. Brightness doesn't go down when I turn off the light in the room, and it stays at the relatively high level it was at. So that currently makes three of us.

Using auto brightness on mine now. Seems fine. Regarding the battery usage, i have wlan at. 30% usage after alot of downloading.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

Apart from the physical characteristics of the batteries discussed above, it is a problem I have encountered in numerous Android devices - the stock battery stats are miscalculated in so many ways, we won't even have enough time to name them all (I remember users panicking about the dialer "draining" the battery in numerous threads, while in most cases it was only the stat issue showing the dialer using most of the battery after making/answering an initial call).
For some different measures, try different apps from Google Play, like Badass battery for example: https://play.google.com/store/apps/details?id=com.gsamlabs.bbm

According to the review from Taiwan, the Infinity could watch youtube movies for almost 7 hours. The brightness was set to max, volume was set to 50%, using wifi to connect to internet.
http://www.mobile01.com/topicdetail.php?f=605&t=2798754&last=36953142

commanlin said:
According to the review from Taiwan, the Infinity could watch youtube movies for almost 7 hours. The brightness was set to max, volume was set to 50%, using wifi to connect to internet.
http://www.mobile01.com/topicdetail.php?f=605&t=2798754&last=36953142
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http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/
Engadget said they got about 9:30 out of the thing. 14:43 with the dock attached. That's looping a 720p video with wifi on, and the screen cranked to 50%. I think with normal usage, you can crank out a good amount of time. You just have to find that sweet spot with battery usage. I know I'm still working that out on my Bionic...but I've gotten that to last all day lately.

KilerG said:
http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/
Engadget said they got about 9:30 out of the thing. 14:43 with the dock attached. That's looping a 720p video with wifi on, and the screen cranked to 50%. I think with normal usage, you can crank out a good amount of time. You just have to find that sweet spot with battery usage. I know I'm still working that out on my Bionic...but I've gotten that to last all day lately.
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After one week of usage mine lasts about 9 hours while idling with 50% brightness, about 4-6 hours while watching youtube or browsing and about 3 hours while watching videos or gaming at 100% brightness and IPS+ on. Right now battery is at 66% after 1:48 of youtube and browsing with about 35% brightness, Badass Battery estimation - 3:06 left. What is battery life on your Infinity?

Battery sucks! Faulty unit or crappy software? HELP

I have used this tablet for 2 days now and almost everything works perfect (thanks to latest ota) but there's one thing that is bothering me. Battery life. I had ipad 3 for 2 months but I finally sold it and bought the infinity. Now I know ios sucks on phones AND tablets. But the battery life was amazing. I could use it to browse and for games for 9 hours at least. But on the infinity I am lucky if I get 4 hours browsing. 4 hours sucks on a tablet. But I think that wifi is the problem. I have added 2 pictures were you can see I used the tablet for 1 hour last night then I used it for almost 3 more hours today. Now the battery is at 10%. But I was wondering why the battery uses 62%? On my galaxy nexus wifi is using 5%.
Have I got a faulty unit or is it like this for everyone? If so please let me know fast so I can send it back before it's too late.

Somethings not right there. Tests/reviews done by some major outlets (thinking PC World or Engadget) reported 9 hours of video play over wifi with screen at 50% brightness. iOS has always had good battery life due to their stict contols over the OS, but you should be seeing more then 4 hours. Hell I was at 40% and played WindUp Knight for hours straight last night which takes up much more battery then a movie. I usually don't suggest using task managers, but there is one built in by asus, I'd use it and see if you can kill some processes. Also be mindful which profile is being used. I stick to balanced most of the time and switch to low when the battery starts getting low (24%ish)
http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/
The TF700 packs a 25Wh battery rated for up to nine and a half hours of runtime. Indeed, it lasted nine hours and 25 in our battery rundown test, which involves looping a video with WiFi on and the brightness fixed at 50 percent.
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Thanks for the reply. I am always on Balanced and i am seeing over 20% down in an hour. Maybe i have a faulty unit?

I wouldn't be so sure. I was playing nova 3 on performance mode though.

jdeoxys said:
I wouldn't be so sure. I was playing nova 3 on performance mode though.
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Hmm so i'm not the only one. I hope Asus fixes this fast or im gonna have to return, but i can't see any tablet better then this atm.

armanisafarai said:
Hmm so i'm not the only one. I hope Asus fixes this fast or im gonna have to return, but i can't see any tablet better then this atm.
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Well, what do you expect? It's going to take some power to push all the pixels on this massive resolution.

jdeoxys said:
Well, what do you expect? It's going to take some power to push all the pixels on this massive resolution.
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Exactly, it all depends on what your doing OP. The movie scenerio in the review doesnt take much juice in that it uses the low power single core. I don't know for sure, but web browsing may require all 4 cores to kick in depending on exactly what your doing. Regardless, your wifi being a big consumer is easy to deal with. Somewhere in the settings is an option that automatically turns wifi off when screen is off.

Chief Geek said:
Exactly, it all depends on what your doing OP. The movie scenerio in the review doesnt take much juice in that it uses the low power single core. I don't know for sure, but web browsing may require all 4 cores to kick in depending on exactly what your doing. Regardless, your wifi being a big consumer is easy to deal with. Somewhere in the settings is an option that automatically turns wifi off when screen is off.
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Well, all i was doing was using chrome... I think it's pretty bad when i cant browse for more then 4 hours on a tablet. I thought it had to do something with WiFi since its using over 62%. I did the same test with my nexus where i i just used chrome and when i looked in battery , wifi only used 10%. Maybe there is a bug with wifi?

Try Battery HD for some averages/estimates.
I tend to get about 9+ hrs of reading, balanced mode, WiFi off, and about 7 hrs of browsing over WiFi (undocked, dock charges me about 2/3 full), but it all drops down drastically for gaming, which is about 4 hrs you mentioned.
If you get 4 hrs of pure browsing, I'd consider re-flashing, wiping data and - if these don't help - returning your device.

Chief Geek's point has much merit, and you could always look at (for example) GreenPower or some other time-/screen-based toggler. They do pretty well, and you do not even lose out anything except direct push functionality. (Does it really matter for 99.9% of mail when it comes in once every 15 or 30 minutes? When it does (when you're buying a house or something), shut down the toggler for the time being and cope with some battery drain, then when the situation has resolved, enable it again.
And try using BetterBatterStats for your statistics -- the main battery stat app Android offers has some quirks to prevent meaningful interpretations of many scenarios. Let that get a few charging/discharging cycles and then look at the stats.

So battery hd tells me I should get 8 hours of browsing and 9 for video playback. Will do another test tomorrow with screen on whole time and see how long it will last watching videos. Also battery hd tells me I can play 3d games for only 2 hours. Eh

MartyHulskemper said:
Chief Geek's point has much merit, and you could always look at (for example) GreenPower or some other time-/screen-based toggler. They do pretty well, and you do not even lose out anything except direct push functionality. (Does it really matter for 99.9% of mail when it comes in once every 15 or 30 minutes? When it does (when you're buying a house or something), shut down the toggler for the time being and cope with some battery drain, then when the situation has resolved, enable it again.
And try using BetterBatterStats for your statistics -- the main battery stat app Android offers has some quirks to prevent meaningful interpretations of many scenarios. Let that get a few charging/discharging cycles and then look at the stats.
Click to expand...
Click to collapse
I installed betterbatterystats last night, will do more testing.

armanisafarai said:
So battery hd tells me I should get 8 hours of browsing and 9 for video playback. Will do another test tomorrow with screen on whole time and see how long it will last watching videos. Also battery hd tells me I can play 3d games for only 2 hours. Eh
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Remember that these are just averages for your device, at least in the beginning.

If you mistreated your battery upon receiving it, it can kill battery life. You are suppose to plug in your asus tablet for at least 8 hours (well beyond the tablet would say the battery is 100%) the first time you get it. This is sound advice for any new Lithium Ion Battery.
Then you can start using it. Letting the battery die at 0% also decrease the life of the Li-Ion battery every time it happens (ignore old sites that say you should do a full discharge cycle every 2 weeks, that was for old Nickel Cadmium batteries).
Juice Defender is typically a phone app but you can run it as well to detect if any background processes are eating up your battery life.
I get almost 10 hours on my TF700 with moderate usage (mix of browsing, video playback, reading, etc.).

Diogenes5 said:
If you mistreated your battery upon receiving it, it can kill battery life. You are suppose to plug in your asus tablet for at least 8 hours (well beyond the tablet would say the battery is 100%) the first time you get it. This is sound advice for any new Lithium Ion Battery.
Then you can start using it. Letting the battery die at 0% also decrease the life of the Li-Ion battery every time it happens (ignore old sites that say you should do a full discharge cycle every 2 weeks, that was for old Nickel Cadmium batteries).
Juice Defender is typically a phone app but you can run it as well to detect if any background processes are eating up your battery life.
I get almost 10 hours on my TF700 with moderate usage (mix of browsing, video playback, reading, etc.).
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Click to collapse
All correct -- there is a lot of disinformation going on with batteries (especially regarding the charging cycles, although a single, long, full charge and then draining to zero charge actually helps calibrate the battery indication algorithms in the device). The optimum minimum charge level seems to be about 40% or so I've read.
Juice Defender and Greenpower toggle WiFi on either time- or location-based profiles, and that works on tablets as well. Recommended!

Your phone doesnt actually discharge a battery to zero. The thing with lithium batteries is they maintain voltage untill nearly the end. This is a very large benifit for modern devices. Once the voltage starts to drop the phones circuitry cuts it off and prevents it from powering on with the LVC circuit that checks the battery before allowing phone to power on then immeditately cuts it (first attempting a power down then all out power cut). This happens to protect the battery. So what the phone considers a dead battery is simply an exhausted battery ready for charge. If a lithium is actually dischardged completely it will damage the cell and prevent it from taking a charge. The power being given to it is then converted to heat. The battery then ignites and very very bad things happen such as your house burning down. The point of all that is to point out that discharging your phone to "zero" isn't actually doing any damage past the normal wear and tear on the battery. I buy batteries that cost hundreds for some of my RC hobbies and have learned the hard way about how lithium batteries work. (bypassed LVC and ruined a $80 3S2P pack)

Diogenes5 said:
If you mistreated your battery upon receiving it, it can kill battery life. You are suppose to plug in your asus tablet for at least 8 hours (well beyond the tablet would say the battery is 100%) the first time you get it. This is sound advice for any new Lithium Ion Battery.
Then you can start using it. Letting the battery die at 0% also decrease the life of the Li-Ion battery every time it happens (ignore old sites that say you should do a full discharge cycle every 2 weeks, that was for old Nickel Cadmium batteries).
Juice Defender is typically a phone app but you can run it as well to detect if any background processes are eating up your battery life.
I get almost 10 hours on my TF700 with moderate usage (mix of browsing, video playback, reading, etc.).
Click to expand...
Click to collapse
i have actually read that Li-Ion batteries can be used out of the box. Sp i turned on my infinity right away. I put the charger in, but i still used the tablet. It was about 25% when i got it out of the box. So what you're saying is that i have basically ****ed up the battery? If so, then i will return and get a new one. But i dont understand why most people say that you can usre a device with Li-Ion battery staright out of the box without needing to charge it first.

Chief Geek said:
Your phone doesnt actually discharge a battery to zero. The thing with lithium batteries is they maintain voltage untill nearly the end. This is a very large benifit for modern devices. Once the voltage starts to drop the phones circuitry cuts it off and prevents it from powering on with the LVC circuit that checks the battery before allowing phone to power on then immeditately cuts it (first attempting a power down then all out power cut). This happens to protect the battery. So what the phone considers a dead battery is simply an exhausted battery ready for charge. If a lithium is actually dischardged completely it will damage the cell and prevent it from taking a charge. The power being given to it is then converted to heat. The battery then ignites and very very bad things happen such as your house burning down. The point of all that is to point out that discharging your phone to "zero" isn't actually doing any damage past the normal wear and tear on the battery. I buy batteries that cost hundreds for some of my RC hobbies and have learned the hard way about how lithium batteries work. (bypassed LVC and ruined a $80 3S2P pack)
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Nothing to add, technical and extensive, but fully correct, sir. I think we may have had a slight misunderstanding, however: my point was that discharging your phone to 'zero' (and as you rightfully point out, that is not an actual fully discharged battery state) is a required step in calibrating most device's algorithms (some devices, such as my SGS2 do not need this because of advanced hardware). I'd rather not fully discharge any Li-Ion batteries either.
Sent from my ASUS Transformer Pad TF700T

armanisafarai said:
i have actually read that Li-Ion batteries can be used out of the box. Sp i turned on my infinity right away. I put the charger in, but i still used the tablet. It was about 25% when i got it out of the box. So what you're saying is that i have basically ****ed up the battery? If so, then i will return and get a new one. But i dont understand why most people say that you can usre a device with Li-Ion battery staright out of the box without needing to charge it first.
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A typical case of RTFM, an affliction I sometimes suffer from as well, as do most men. Hahaha! Do you think ASUS put it in the manual for laughs, or just to give you a few more hours of painful desire to use your device while you cannot, yet? Nah, it's there for a reason. Sometimes, though -- and again that's SGS2 experience -- just running a few battery cycles might make the readout correspond to the actual battery level again. You could at least give it a try, right?
Sent from my ASUS Transformer Pad TF700T

armanisafarai said:
I have used this tablet for 2 days now and almost everything works perfect (thanks to latest ota) but there's one thing that is bothering me. Battery life. I had ipad 3 for 2 months but I finally sold it and bought the infinity. Now I know ios sucks on phones AND tablets. But the battery life was amazing. I could use it to browse and for games for 9 hours at least. But on the infinity I am lucky if I get 4 hours browsing. 4 hours sucks on a tablet. But I think that wifi is the problem. I have added 2 pictures were you can see I used the tablet for 1 hour last night then I used it for almost 3 more hours today. Now the battery is at 10%. But I was wondering why the battery uses 62%? On my galaxy nexus wifi is using 5%.
Have I got a faulty unit or is it like this for everyone? If so please let me know fast so I can send it back before it's too late.
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Click to collapse
I see the same picture here. Looking at the battery stats I see WIFI using >90% of the battery when surfing in balanced/50% backligt mode.
Hope they fix this.

What exactly happened here?

So I'm running CM10.2 and was on one of the newer nightlies (10/02 I think). Basically my phone was being weird and the battery was dying extremely quickly. It got to 2% in about 6 hours so I put it on airplane mode. I checked about 30 minutes later and the battery was at 7%. I thought maybe this might be some battery calibration thing but the night before, my phone died on me (on the same nightly build), thus 're-calibrating' it when it hit 0%.
I'm wondering how this is possible and if it's a battery calibration or software thing.

TheDiddler said:
So I'm running CM10.2 and was on one of the newer nightlies (10/02 I think). Basically my phone was being weird and the battery was dying extremely quickly. It got to 2% in about 6 hours so I put it on airplane mode. I checked about 30 minutes later and the battery was at 7%. I thought maybe this might be some battery calibration thing but the night before, my phone died on me (on the same nightly build), thus 're-calibrating' it when it hit 0%.
I'm wondering how this is possible and if it's a battery calibration or software thing.
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First it's not good do discharge lithium ion batteries all the way. If you have a habit of doing that it could be part of your issues. Second, you don't need to calibrate this type of lithium ion battery. It's not a smart battery so there's no chip to calibrate. Third batteries have a definite life cycle that can be shortened by certain things like excessive heat during charging from a low state. It's hard to tell for sure but I've seen lots of phones do the same thing when their battery was about to give up. If the issues starts happening more frequently and across various ROMs then get a new battery.

theesotericone said:
First it's not good do discharge lithium ion batteries all the way. If you have a habit of doing that it could be part of your issues. Second, you don't need to calibrate this type of lithium ion battery. It's not a smart battery so there's no chip to calibrate. Third batteries have a definite life cycle that can be shortened by certain things like excessive heat during charging from a low state. It's hard to tell for sure but I've seen lots of phones do the same thing when their battery was about to give up. If the issues starts happening more frequently and across various ROMs then get a new battery.
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Click to collapse
First off, I never do this. My battery usually never goes below around 30%. Second, by re-calibrate, I don't mean the old lithium battery theory where you lose battery if you never go below a certain %, but instead, re-calibrating the battery software so it knows what 0% actually is.

TheDiddler said:
First off, I never do this. My battery usually never goes below around 30%. Second, by re-calibrate, I don't mean the old lithium battery theory where you lose battery if you never go below a certain %, but instead, re-calibrating the battery software so it knows what 0% actually is.
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Click to collapse
Recharging at around thirty is definitely the way to go. Your software recalibrates itself after a full charge every time. It could easily have been a really bad wake lock. Install Better Battery Stats and if it drops that fast again then open the app to find out what the cause is. BBS is available free to XDA members but if you find it useful kick down for the paid app. It's worth every bit of 3 bucks. Usually when you see sudden drops then sudden ups it's the battery going bad. I haven't seen anyone else report this issue on CM 10.2 or any other 4.3 ROMs that I follow. Which is most of them. So I'd just keep an eye on it.

theesotericone said:
Recharging at around thirty is definitely the way to go. Your software recalibrates itself after a full charge every time. It could easily have been a really bad wake lock. Install Better Battery Stats and if it drops that fast again then open the app to find out what the cause is. BBS is available free to XDA members but if you find it useful kick down for the paid app. It's worth every bit of 3 bucks. Usually when you see sudden drops then sudden ups it's the battery going bad. I haven't seen anyone else report this issue on CM 10.2 or any other 4.3 ROMs that I follow. Which is most of them. So I'd just keep an eye on it.
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Hmm I see, thanks a lot. What I did was go back to a previous nightly that I haven't had issues with but I'll definitely check out BBS.

TheDiddler said:
Hmm I see, thanks a lot. What I did was go back to a previous nightly that I haven't had issues with but I'll definitely check out BBS.
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You should also check your battery physically. When batteries go bad they will swell and become convex. The easiest way to test this is put your battery on a flat surface and see if it rocks from side to side. If it rocks at all get a new one from amazon then throw the old one away.

theesotericone said:
You should also check your battery physically. When batteries go bad they will swell and become convex. The easiest way to test this is put your battery on a flat surface and see if it rocks from side to side. If it rocks at all get a new one from amazon then throw the old one away.
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My battery seems to be ok. I can usually go through a day. My phone is also pretty much flat and very very slightly wobbles so it should be good. I also plan on getting the Nexus 5 when it comes out even though I have about 1.5 years left on my contract so I think it should last till then,

[Discussion] Battery Health

Hi guys,
as we are approaching nearly 1.5 years since the Pixel 5 was released, I am curious what everyone's Battery Health is.
You can use Accubattery.
BatteryGuru also has it included in their app.
It will take a few charges to get an accurate reading.
I take pretty good care of my battery, by never going below 20% and only gone about 80% maybe 10 times.
I just got Accubattery on my device so I will update where I am in a little bit.

Well since I feel itt'll take a good 4-5 charges before any type of "accurate" measurement is shown, I decided to do a full charge and I'm very happy, I feel like this is at least 90% the capacity still. Right now BatteryGuru is showing 70% but I expect it to *hopefully* go up, since accubattery is showing 85%, but this is only after 1 charge.
Running Android 11 crDroid v7.15

I did 1 full charge (35% => 100%) with AccuBattery, says my battery health is 93% (3 718 mAh / 4 000).
Not bad I guess, for a 16 month old phone which I used to charge regardless to "efficiency rules".
I used stock rom, and rooted couple of months ago. And only recently switched to lineageos 18.1 and elementalx kernel so I can't tell if there's a difference.
I'll take a look at crDroid, but I can't help installing some google stock apps - force of habits.
If I see any significative change after some charging cycles I'll give an update.
Btw are you using a custom kernel?

AnyNameYouWish said:
I did 1 full charge (35% => 100%) with AccuBattery, says my battery health is 93% (3 718 mAh / 4 000).
Not bad I guess, for a 16 month old phone which I used to charge regardless to "efficiency rules".
I used stock rom, and rooted couple of months ago. And only recently switched to lineageos 18.1 and elementalx kernel so I can't tell if there's a difference.
I'll take a look at crDroid, but I can't help installing some google stock apps - force of habits.
If I see any significative change after some charging cycles I'll give an update.
Btw are you using a custom kernel?
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Click to collapse
Thanks for posting my friend! That's a great starting point, I hope that it only gets better for you!
I'll upload images from what accubattery and batteryguru are currently showing, now that I have a few charges completed. I hope to see a higher health.. but it could always be worse. I remember my htc 10 bring at like 70% at this point in it's ownership.. though Android wasn't as up-to-date with battery adaptivities.
I used to use ElementalX but since lack of updates for Android 11 I've been pretty happy with crDroid stock kernel. (Though I have used the last update that was out and it ran quite nicely before I moved fully to crDroid. So I may give it a go and see what type of battery I am getting compared to crDroid stock).
CrDroid also comes with PixelGapps installed, which I personally love. So you'll get Pixel launcher, Camera and other Google apps/goodies .

I am not a very patient man, and a few minutes reading about this rom convinced me to try it asap !
Love it so far, I really like the stock experience with easy tweaks possibilities - I also already shared my gratitude and first issues in the main thread
I'll keep stock kernel for a few weeks and share accubattery and batteryguru screenshots here, before giving a try to elementalx kernel and see if there's a difference

This is all stock with root and some modules installed. I received my device in November of the year it was released

elong7681 said:
This is all stock with root and some modules installed. I received my device in November of the year it was released
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Dang! That's awesome health! You do anything special?
Mine is down to 87% for some reason.

andybones said:
Dang! That's awesome health! You do anything special?
Mine is down to 87% for some reason.
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Just kept my battery charged between 80% to 20%

90% here. Have the phone almost since launch and accubattery since then. Don't follow the 80% rule too much. I use to follow it religiously but then read a comment somewhere that by following it, you are at 80% health effectively so... it made sense.

ribogushter said:
90% here. Have the phone almost since launch and accubattery since then. Don't follow the 80% rule too much. I use to follow it religiously but then read a comment somewhere that by following it, you are at 80% health effectively so... it made sense.
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Click to collapse
So after few weeks I'm 90% on Accubattery and 85% on Batteryguru. I did noticed the stats were pulled down when I charged only to 80%, so I would tend to agree...
andybones said:
I used to use ElementalX but since lack of updates for Android 11 I've been pretty happy with crDroid stock kernel. (Though I have used the last update that was out and it ran quite nicely before I moved fully to crDroid. So I may give it a go and see what type of battery I am getting compared to crDroid stock).
Click to expand...
Click to collapse
I installed ElementalX a couple of days ago, I've let it just as it is out of the box, no personnal settings. It seems to be very efficient with battery usage but maybe too much because I don't receive whatsapp calling notifications anymore, only "missed call" once it's too late... gonna take a look on the official topic to check it out.

AnyNameYouWish said:
So after few weeks I'm 90% on Accubattery and 85% on Batteryguru. I did noticed the stats were pulled down when I charged only to 80%, so I would tend to agree...
I installed ElementalX a couple of days ago, I've let it just as it is out of the box, no personnal settings. It seems to be very efficient with battery usage but maybe too much because I don't receive whatsapp calling notifications anymore, only "missed call" once it's too late... gonna take a look on the official topic to check it out.
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Click to collapse
Thanks for posting!
I am at 90% myself actually, and noticed it actually went up from 88% to 90% when I charged it over 80% to 85%.
So maybe with all the new changes and upgrades to batteries, etc, charging to 100% is just fine?
I think it is the charging overnight for more than 8 hours can possibly be harmful.
I think I'll start charging to 90%.
Maybe try adding whatapp to battery optimization, is you haven't already to see if you start getting the notifications.

andybones said:
So maybe with all the new changes and upgrades to batteries, etc, charging to 100% is just fine?
I think it is the charging overnight for more than 8 hours can possibly be harmful.
I think I'll start charging to 90%.
Maybe try adding whatapp to battery optimization, is you haven't already to see if you start getting the notifications.
Click to expand...
Click to collapse
Already tried that but thanks for suggestion
About battery, I'm far from being an expert but I think it's still good to charge up to a lower lever eg. 80-90%, in order to preserve battery health and loose less capacity at each cycle. However, in order to properly measure the battery's performance, you'll have to give it a full charge or the stats will be inaccurate, as @ribogushter mentionned.
I would suggest, wipe your Accubattery and/or Batteryguru stats and give your phone a full charge from 20 to 100% and see if it impacts your health score

AnyNameYouWish said:
Already tried that but thanks for suggestion
About battery, I'm far from being an expert but I think it's still good to charge up to a lower lever eg. 80-90%, in order to preserve battery health and loose less capacity at each cycle. However, in order to properly measure the battery's performance, you'll have to give it a full charge or the stats will be inaccurate, as @ribogushter mentionned.
I would suggest, wipe your Accubattery and/or Batteryguru stats and give your phone a full charge from 20 to 100% and see if it impacts your health score
Click to expand...
Click to collapse
Darn sorry, wish I knew what else for you to try.
I think I will keep my stats in accubattery as it gets better with time, but I will charge it to 100% and see if it drops, goes up, or just stays the same at 90% health.
Edit: both accubattery and battery guru dropped a bit after charging to 100%.. down from 90% to 88% accubattery, and 89% to 86% battery guru.
I think I will probably do 90% from here-after though, I still think charging all the way to 100% all the time isn't the best, but I really don't know anymore!
I'd like to read more about getting the only 80%, I mean it's just common sense that you get actually only 60% if you run from 80%-20%, but that is charge capacity, not battery health capacity.
I do wish Google/Android had some documentation on this. Even cApple at least has a battery capacity built into its settings, and I saw they have a setting that tells if say the screen was replaced was it done using official cApple products, very good idea actually.
Also how has ElementalX been running?
I decided to flash it and see how it compares to the stock kernel in crDroid_v7.17 (Android 11)
I always loved it when I used it, but it is a little out-dated, (over a year now) but I think it's still fine.
Proton kernel is also really good.

andybones said:
Darn sorry, wish I knew what else for you to try.
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Click to collapse
I think it was becase I enabled data saving, and since I put Whatsapp on the exception list the problem seems to be solved. Once again, the problem was between the chair and the screen ^^
andybones said:
I think I will keep my stats in accubattery as it gets better with time, but I will charge it to 100% and see if it drops, goes up, or just stays the same at 90% health.
Edit: both accubattery and battery guru dropped a bit after charging to 100%.. down from 90% to 88% accubattery, and 89% to 86% battery guru.
I think I will probably do 90% from here-after though, I still think charging all the way to 100% all the time isn't the best, but I really don't know anymore!
Click to expand...
Click to collapse
As you said, we probably never will have a 100% effective method to quantify battery health until it's native to Android ¯\_(ツ)_/¯
andybones said:
Also how has ElementalX been running?
I decided to flash it and see how it compares to the stock kernel in crDroid_v7.17 (Android 11)
I always loved it when I used it, but it is a little out-dated, (over a year now) but I think it's still fine.
Proton kernel is also really good.
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Click to collapse
Really smooth, I'm not experiencing any lags or freeze, or any problem so far and battery life seems to have improved. As a pure rookie, I don't understand what would make a given kernel different or better than the other, so I tried the one that seemed to be the most popular but I noticed only afterward that it hadn't been updated for a while and that the developer is focusing on his apps (he mentioned it on some thread).
Proton kernel's latest update is also almost 1y old, I'll stick with ElementalX until next update or give a try to CleanSlate which seems to be the most active.
Btw, I guess you're using ACC? If so, which charging switch are you using?

Best way to measure your battery is to charge it with an USB tester such as UM24 or UM25 . You can see how much mAH your battery can absorb and calculate the health . Phone needs to be turned off and charged with a regular charger, not fast-charger .
I'm looking for a good benchmark for the battery , i tried Geekbench4 , PC Mark ..do you any other good ones ?

Not that I think it helps I am always on my PC and just charge through the usb-c.
charges pretty fast too, like 45 min.
I may invest into UM24 orUM 25, thanks @arcadekidflo

If you only use usb-c to usb-c you can get TC-66c , from the same company . If you also use regular chargers you can get UM-25c .

AnyNameYouWish said:
I think it was becase I enabled data saving, and since I put Whatsapp on the exception list the problem seems to be solved. Once again, the problem was between the chair and the screen ^^
As you said, we probably never will have a 100% effective method to quantify battery health until it's native to Android ¯\_(ツ)_/¯
Really smooth, I'm not experiencing any lags or freeze, or any problem so far and battery life seems to have improved. As a pure rookie, I don't understand what would make a given kernel different or better than the other, so I tried the one that seemed to be the most popular but I noticed only afterward that it hadn't been updated for a while and that the developer is focusing on his apps (he mentioned it on some thread).
Proton kernel's latest update is also almost 1y old, I'll stick with ElementalX until next update or give a try to CleanSlate which seems to be the most active.
Btw, I guess you're using ACC? If so, which charging switch are you using?
Click to expand...
Click to collapse
I accidentally charged to 100% again, and health went up in accubattery.
Maybe I will start fully charging..
Oh yea. One thing that helped for me for late notifications is to turn off "Adaptive Notifications"
-- It's been working for me.
some ROMs (such as crDroid) it turns it back back on after every reboot.
I just make a shortcut on my homescreen using Activity Launcher
arcadekidflo said:
If you only use usb-c to usb-c you can get TC-66c , from the same company . If you also use regular chargers you can get UM-25c .
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Click to collapse
Many thanks my friend! Very much appreciated.

Mine looks like it's around 94% - ordered it on release day, so about 1.5 years old now.
I've not followed the 20% - 80% rule, most of the time just letting the phone charge fully over night.
Maybe the 20% - 80% doesn't really make any difference?

IMO it's pretty silly to only use a portion of your battery's indicated capacity. The nature of lithium ion batteries is such that both over and undercharging can cause damage, so manufacturers don't actually use 100%, or even 80%, of their full voltage potential. The battery circuitry itself, as well as the phone's power monitor, do a sufficient job of limiting charge and discharge, so its really not necessary to do it yourself. Use your phone as you normally would, but be aware that keeping it charged all the time may reduce battery life.