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Battery Calibration & Charging

Ok just got my Nexus S from Rogers yesterday!
i started off with flashing CMW, then rooting! then putting on Infin1ty rom!
I charged my battery last night to 95%, (probably overcharged a bit cause i fell asleep), i woke up at 7ish am and started using it and now its 9:50 and the battery has drained to 57%. I was using it pretty heavy and this is off of the 1st charge, that is normal right?
Questions:
1 - Does the evo battery calibration trick work with the Nexus S? Charge fully, kill battery, charge fully, kill battery, then charge again and it is calibrated?
2- What is better? Power off and charge when less than 15%? or just multiple minimal charges in increments? such as charging anytime i feel like it? haha
thanks for the help.

jark99 said:
Ok just got my Nexus S from Rogers yesterday!
i started off with flashing CMW, then rooting! then putting on Infin1ty rom!
I charged my battery last night to 95%, (probably overcharged a bit cause i fell asleep), i woke up at 7ish am and started using it and now its 9:50 and the battery has drained to 57%. I was using it pretty heavy and this is off of the 1st charge, that is normal right?
Questions:
1 - Does the evo battery calibration trick work with the Nexus S? Charge fully, kill battery, charge fully, kill battery, then charge again and it is calibrated?
2- What is better? Power off and charge when less than 15%? or just multiple minimal charges in increments? such as charging anytime i feel like it? haha
thanks for the help.
Click to expand...
Click to collapse
If your starting with a fresh install and a fresh batterystats file(like you are). Using the process you describe above for your Evo will work for calibrating the NS. As for your second question. While in the calibrating process of a battery, I always run the phone until it turns it self off, that way the actual 0% voltage is calculated, followed by an off mode charge on A/C charge for 8-12 hours. By charging while off you are allowing the phones hardware charging circuit to determine a full charge rather then the os battery driver(which is uncalibrated on new install).

drewestate said:
...rather then the os battery driver(which is uncalibrated on new install).
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Click to collapse
Is the battery driver uncalibrated just because he rooted and installed cm7? What if he had left it stock, would it still need to be calibrated? Do you know what I mean?

[Q] how to calibrate the battery for it to last longer??

i heard from my friend that HTC need to do battery calibration. is it true??

Don't think so. Another phone had a "calibration" routine but I haven't heard anything on this one. I tried the calibration routine from the other phone on mine and noticed no difference.

I really have a sucky battery life on htc sensation. I am trying to figure it out how I could get it to last for more than 12hours with average use...

I bought a replacement battery. http://www.amazon.com/gp/product/B0055QKZBS

While a lith-ion battery doesn't learn or have a memory, the battery does have a chip in it that needs to be calibrated. You'll need to cycle your battery from fully charged to fully discharged 3 to 5 times to calibrate this circuit. Normally a LI battery doesn't like to be fully discharged, so try to avoid doing this in everyday use. Better to give it maintenence charges. And heat is a big enemy of these batteries as well.
And seems to me 12 hours is pretty good battery life for a smart phone.

ickster said:
While a lith-ion battery doesn't learn or have a memory, the battery does have a chip in it that needs to be calibrated. You'll need to cycle your battery from fully charged to fully discharged 3 to 5 times to calibrate this circuit. Normally a LI battery doesn't like to be fully discharged, so try to avoid doing this in everyday use. Better to give it maintenence charges. And heat is a big enemy of these batteries as well.
And seems to me 12 hours is pretty good battery life for a smart phone.
Click to expand...
Click to collapse
+1, very well put.
2 points.
1. There are also battery stats on the phone, which need to be built by full charge/discharge cycle.
2. Discharge phone till it's dead with no fear, battery controller shuts it down when there is some juice left. It's like reserve in your tank, it shows you have petrol for 0 miles/kilometers, but in reality there is another 5 litres sitting in the tank.

I worked in the cell phone industry for a long time. The best thing i have seen for a full charge is to regulaurly do a full charge and than turnphone off and plug back in until indicator shows full again(if it shows full already charge for half to full hour). I have always seen better results. Also if rooted wipe battery stats in advanced before flashing any radio or rom.
Sent from my HTC Vision using XDA App

dunes20 said:
I worked in the cell phone industry for a long time. The best thing i have seen for a full charge is to regulaurly do a full charge and than turnphone off and plug back in until indicator shows full again(if it shows full already charge for half to full hour). I have always seen better results. Also if rooted wipe battery stats in advanced before flashing any radio or rom.
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
This may easily be true. I think I read that the battery doesn't actually like being fully charged and that most chargers shut down early because of this. Maybe your tip has something to do with that. I don't know myself how that will correllate w/ calibrating the charge circuit that I spoke of.
Google is definately your friend here.

wrek said:
I bought a replacement battery. http://www.amazon.com/gp/product/B0055QKZBS
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Click to collapse
That's a very intersting battery you got here. It has bigger capacity than the original one. Does it have the same size? Were you able to fit it in and put the original cover back? Have you noticed a noticeable improvement in battery life or is it just scam?
I don't have the tmo 4g, I have the european version, but I believe it should work too, shouldn't it?

Out of the box.... Use it till it dies completely. Charge it 100% without interruption.
I've ALWAYS had great battery life on all my devices using that method.
Do that a few times a month when it's convenient....you'll have a happy battery.
Battery and DRIVER need to be conditioned/calibrated.
I get 12-16 hours with fairly heavy use. If you want more, ya need to wait for different battery tech OR get a dumb phone.
Asking for more than 12 or so hours is just silly with a device this powerful and a display this large. I'm not someone who likes to cut the balls off my superphone to save a few hours on battery life. I'd rather get 12 hours and use this phone the way it was intended too, than get 24 hours and have silly progs like Juice Defender running. Unless you know you're gonna be lost in a forest for a few days, don't most people have access to a charger sometime during their day

eadred said:
I really have a sucky battery life on htc sensation. I am trying to figure it out how I could get it to last for more than 12hours with average use...
Click to expand...
Click to collapse
Disabling the HTC Hub sync helped mine a lot.

My phone has been unplugged for 10 hours, I have 1h 17 minutes of display on time, taking 67% of battery. The rest is spread between Cell standby 11%, Wi-Fi 11%, Phone Idle 8% and Maps 3%.
It is now standing at 29% battery. I find that awful and can't believe any of you say it is normal. I have disabled HTC Hub and Sense sync and all the settings are pretty much the same as on my Galaxy S2.
On the SGS2 I manage to easily get 3 to 4 hours of screen time before the battery goes down to the thirties/twenties and a lot more heavy usage than I've managed on the Sensation. I'm on my second battery cycle and I really hope it improves because I'm very underwhelmed so far.

eadred said:
That's a very intersting battery you got here. It has bigger capacity than the original one. Does it have the same size? Were you able to fit it in and put the original cover back? Have you noticed a noticeable improvement in battery life or is it just scam?
I don't have the tmo 4g, I have the european version, but I believe it should work too, shouldn't it?
Click to expand...
Click to collapse
I found an even larger battery:
http://uk-batteries-galore.co.uk/HTC/32640-Sensation.html
I might wanna give this one a shot, but I am a bit afraid putting battery not manufactured by htc in my phone.

Guys if bothered to look in the Accessories thread, you'd see that there is 1900 battery which some people already have and are very impressed with it.
Sent from my HTC Sensation Z710e using XDA App

HTC QUOTE
Charging the battery
The battery is partially charged when shipped. Before you turn on and start using HTC Sensation, it is recommended that you charge the battery. Some batteries perform best after several full charge/discharge cycles.
I spoke to a HTC REP once regarding batt life on my DHD
He advised a calibration as follows for HTC phones
Make sure fastboot is off.
1. when your battery is low, do a full charge for about 8 hours, your light should now be green. once its full, disconnected the phone
2. Fully switch off the phone(pull battery out if needed then put in). and plug in charger again for an hour, the light will actually be orange even though it was green before you turned it off.
and your screen should load the charging icon for when its turned off.
3.once it is green, turn on the phone. (put in pins or passwords etc) leave the phone on for a minute, then fully turn off again.
4. charge again for an hour and your charging indicator should be green and your battery is calibrated.!

Spybreak said:
My phone has been unplugged for 10 hours, I have 1h 17 minutes of display on time, taking 67% of battery. The rest is spread between Cell standby 11%, Wi-Fi 11%, Phone Idle 8% and Maps 3%.
It is now standing at 29% battery. I find that awful and can't believe any of you say it is normal. I have disabled HTC Hub and Sense sync and all the settings are pretty much the same as on my Galaxy S2.
On the SGS2 I manage to easily get 3 to 4 hours of screen time before the battery goes down to the thirties/twenties and a lot more heavy usage than I've managed on the Sensation. I'm on my second battery cycle and I really hope it improves because I'm very underwhelmed so far.
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Click to collapse
With all due respect....how is that awful?? It's fantastic....
I think you're too caught up in the percentage number the stats page shows for battery use. It doesn't matter one bit if that graffic shows the display at 99.99%. As long as you're getting a full day out of your Sensation....isn't that all that really matters? Or am I confused by what bothers you?? Sounds to me like you're getting a full day...unless you don't sleep??
You've been unplugged for 10 hours and it seems as if you have another 2-4 hours left with that 30%.... Whats wrong with that? It's great.
This is not a Nokia 6133 It's a dual-core superphone, with a 4.3" qHD display.
Of course by the nature of the tech, amoled will be more efficient with regards to display...but as far as I can tell, the GS2 doesn't last any longer than this phone on a regular day to day basis under normal to heavy use.
I get 12-16 hours on a charge with fairly heavy use. Sync, WiFi, Calls, Web, GPS...nothing disabled or throttled.
I wouldn't get caught up with that % number in the battery stats....it's misleading....big time.
Condition the battery properly....you'll never have any battery issues...unless it's faulty.
Also people just need to be realistic with regards to battery life.... A gallon of gasoline will get you much further in a VW Bug than a Bugatti....

lunze86 said:
i heard from my friend that HTC need to do battery calibration. is it true??
Click to expand...
Click to collapse
There is an app to calibrate your battery, but you need to be rooted. Go to www.teamroyal.net and there is instructions that you MUST follow. Read up on it now so you can be prepared for when we get root. You also ONLY want to calibrate your battery once every 4-6 weeks, and only if it needs it. Doing it too often can fry your battery.
I know this doesn't directly answer your question, but I hope it will help many once we get root.
Sent from my HTC Sensation 4G using XDA App

ikhzter said:
HTC QUOTE
Charging the battery
The battery is partially charged when shipped. Before you turn on and start using HTC Sensation, it is recommended that you charge the battery. Some batteries perform best after several full charge/discharge cycles.
I spoke to a HTC REP once regarding batt life on my DHD
He advised a calibration as follows for HTC phones
Make sure fastboot is off.
1. when your battery is low, do a full charge for about 8 hours, your light should now be green. once its full, disconnected the phone
2. Fully switch off the phone(pull battery out if needed then put in). and plug in charger again for an hour, the light will actually be orange even though it was green before you turned it off.
and your screen should load the charging icon for when its turned off.
3.once it is green, turn on the phone. (put in pins or passwords etc) leave the phone on for a minute, then fully turn off again.
4. charge again for an hour and your charging indicator should be green and your battery is calibrated.!
Click to expand...
Click to collapse
for step 1 is it after 8 hours i disconnect the phone even though it will be green light earlier???

Weird Anker battery issue

Second day with the battery. I ran it down today to the point where it shut off and wouldn't turn on. I charged it with the phone off for about 30 minutes and turned it back on. The charge was 54%. Did it really charge that fast?
Sent from my HTC Sensation 4G using Tapatalk

I just checked mine and it shows that over the last 20 minutes mine has gone from 1-99% & that's just ridiculous.
Also it seems that even after 2.5 hours of charging with the phone off (first two times with the anker) it still doesn't turn the led to green
sent from HTC Sensation

Same issue..
I have the same issue...ran Anker battery down and recharged for 5 minutes, battery widget showed 54% charge, the System Returned charge was like 5% so there is an obvious disconnect there. I get a green light if I charge for 3+ hours, just left it charging at work. Until we get the Sensation rooted and can reset the battery stats, this probably will remain an issue.
I guess you can temp root it and reset the battery stats but I'll wait for perm root.

I read somewhere in this forum that you have to configure the phone to somedegree to show the correct battery status, no idea how though

unixman2000 said:
I have the same issue...ran Anker battery down and recharged for 5 minutes, battery widget showed 54% charge, the System Returned charge was like 5% so there is an obvious disconnect there. I get a green light if I charge for 3+ hours, just left it charging at work. Until we get the Sensation rooted and can reset the battery stats, this probably will remain an issue.
I guess you can temp root it and reset the battery stats but I'll wait for perm root.
Click to expand...
Click to collapse
My Anker should be here in a few days. As you suggested, you guys just might need to reset the battery stats. So you'll know, I used a battery calibration tool and it worked great under temp root. With stock battery, my % would spike pretty quick one way or another....it did help give me more steady readings. No worries there....

I have a similar issue with the stock battery, if I'm charging and I restart it the battery % jumps.

Just charged up my new anker yesterday for about 9 hours. Popped it in this morning. I will do three full overnight charges and full dicharges and report back. My chichitec got the same conditioning and its lasting about 25 hours for me. We will see. Got this thing for 9.50 so it won't be the end of the world. Seems good so far. At 99% and had it off the charger for three hours. Phone call and some email and xda.
Once we get root ill be wiping the battery stats for sure though.
Sent from my HTC Sensation 4G using XDA Premium App

unixman2000 said:
I have the same issue...ran Anker battery down and recharged for 5 minutes, battery widget showed 54% charge, the System Returned charge was like 5% so there is an obvious disconnect there. I get a green light if I charge for 3+ hours, just left it charging at work. Until we get the Sensation rooted and can reset the battery stats, this probably will remain an issue.
I guess you can temp root it and reset the battery stats but I'll wait for perm root.
Click to expand...
Click to collapse
Use battery calibration app it wipes stats.
Sent from my HTC Sensation 4G using XDA Premium App

Hoggles said:
My Anker should be here in a few days. As you suggested, you guys just might need to reset the battery stats. So you'll know, I used a battery calibration tool and it worked great under temp root. With stock battery, my % would spike pretty quick one way or another....it did help give me more steady readings. No worries there....
Click to expand...
Click to collapse
care to walk me through how to do this (not the temp root) so I can reset my battery stats?

I'm having this issue with my Chichitech battery. There's no damn way it's at 99% after letting it charge from 0% 3 hours ago.

Battery Calibration - Once and for all!

I have read every possible thread you can imagine on battery calibration and can never seem to do this correctly, is it a myth? No matter what I do, if I restart my phone, I end up going from 100% down to 85-86% EVERY SINGLE time.
This is after "bumping it". (letting it drain all the way to 0% and then fully charging again).
This is after using BATTERY CALIBRATION in the market which was told works well. (again, advises you charge to 100% then "calibrate" it via the APP).
This is after charging it to 100% and restarting it, recharging up to 100%, restarting and recharging (repeat, repeat, repeat), and then going into bootloader and wiping battery stats.
None of these have worked, does someone have a sure fire EXACT way to do this properly or is at ALL just hype? Help.

Your battery will never say 100% after a reboot. It sucks up a lot of juice on a power up and the battery doesn't charge during powering on. I usually drop about 10% on a reboot using the rezound battery. That is normal behavior. If you can charge to 100% with the phone on then you're fine.
Sent from my ADR6400L using Tapatalk

Interesting because I've never lost 15-16% consistently although I guess it using some juice to cycle makes sense. Anyone else seen 10+ every restart? Thanks for the help man in either case.

Hmm, never seen this before. On my phone which is running skyraider uc to 768mhz and uv only loses 1percent on reboot or doesn't even lose charge at all. Not sure why your phone is doing that.
Sent from my ADR6400L using xda premium

I am running G3D uc to 768mhz and on restart I may lose 1 - 5% at most depending on if i made any changes that take a longer restart. I bet you are overclocked? no need, under clock to 768mhz and your phone will run as smooth as 1.2mhz..maybe smoother while using less battery

Running liquid 3.2.1 on my T-Bolt with the Rezound battery and I only lose 1% battery at boot up. Never lost more...oh and I have never calibrated my battery. Also I get about 8-10 hours of moderate to heavy use too. All stock clocks btw

Just to double check - or reword... do it this way - if you aren't already.
Charge to 100%.
Wipe Batt stats
Drain to zero without recharging in any way (AKA let it drain until it shuts off on you).
Recharge until 100% (till it says 100%, not just "green."). And unplug.
And you're good! Try that and check back in.

Battery Calibration doesn't work

Ignore the % number, it means nothing. Use the battery monitor widget or another program that will show you the actual battery voltage. A fully charged battery will be somewhere around 4200 mV and a discharged battery between 3600 and 3200 mV. I've also noticed that the rezound battery throws things off as the mAh rating doesn't match up to either of the thunderbolt batteries. This is why the battery monitor widget shows the rezound battery as 2750 mAh instead of 1620.

What I recommend to my Evo peeps [which I have] is this:
-Charge battery to 100%
-Wipe battery stats in recovery
-Let the battery drain, so it manually powers off
-Charge to 100% again, and good to go

Battery Calibration doesn't work
Click to expand...
Click to collapse
By this I mean Google Developers have came out recently and said battery calibration does not increase or have any effect on the state of battery life. All wiping the battery stats does is wipe the stats as to what has been using the battery, etc.
still handy for when you flash a new rom to wipe the stats, but it doesn't improve battery life at all.

smoody said:
By this I mean Google Developers have came out recently and said battery calibration does not increase or have any effect on the state of battery life. All wiping the battery stats does is wipe the stats as to what has been using the battery, etc.
still handy for when you flash a new rom to wipe the stats, but it doesn't improve battery life at all.
Click to expand...
Click to collapse
Actually, the post from Dianne @ Google said nothing about calibration. She only talked about wiping or deleting the battery stats file.

You are correct, however all the battery calibration apps available only delete the battery stats file. So like I said it doesn't affect battery life.

wherestheboost said:
Just to double check - or reword... do it this way - if you aren't already.
Charge to 100%.
Wipe Batt stats
Drain to zero without recharging in any way (AKA let it drain until it shuts off on you).
Recharge until 100% (till it says 100%, not just "green."). And unplug.
And you're good! Try that and check back in.
Click to expand...
Click to collapse
This is what I thought I had done but will do again. The problem is even after its 100% and in between your 1st and 2nd step when I reboot into recovery, it's no longer at 100% and sometimes down to 85%ish. I will try again tho, thanks!

http://rootzwiki.com/_/articles/wiping-battery-stats-is-pointless-says-google-r316
That pretty much says it. Wiping stats and calibrations are placebos.

l7777 said:
That pretty much says it. Wiping stats and calibrations are placebos.
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Click to collapse
Yeah I read that too. But when I flashed my first rom on the tb I got abysmal battery life. 25% in like 20 min. I recalibrated and it got so much better. If its a placebo its a good one.
Sent from my HTC ThunderBolt using Tapatalk

all that says is the the deleting the batterybin file doesn't help. The battery is handled by each by software outside of android itself. So, following the battery calibration from the manufacturer of your phone still might help.

jefferyriess said:
Yeah I read that too. But when I flashed my first rom on the tb I got abysmal battery life. 25% in like 20 min. I recalibrated and it got so much better. If its a placebo its a good one.
Sent from my HTC ThunderBolt using Tapatalk
Click to expand...
Click to collapse
25% in 20 minutes means nothing. The % is an estimated number. Find an app that reads the battery voltage if you want a true reading on the battery's charge. Full is 4.2 volts, dead is between 3.0 - 3.6 volts. Battery life should only be measured in hours from full to dead. I've seen my phone stick on 100% for several hours before as well as sticking at 20% for several hours. Ignore the %. Anyone spending all day looking at a % to judge their battery life should go back to a battery indicator that doesn't show %.

Do I need a kernel or something to use the Mugen 3200mAh battery?

I was reading around the forum and through all the things about extended batteries and stuff to decide that I was going to buy the Mugen 3200mAh one.
My question is Droidzone has this thing called "EBatt/EBFix=Droidzone's fix for Extended Batteries". Do I need that for my extended battery or will it have no problems with charging? I believe his fix is set for 2400mAh but mine is 3200mAh.
I put in my extended battery and it was at 0% charge, only thing I notices was Battery Widget Widget Pro didn't know how many mAh so I assume neither does the phone (because its not an official HTC battery).
I'm doing what the Mugen User Guide is telling me, which is to charge the phone for 8-12 hours even if it shows full charge for the first 4-5 times.
Correct me if I'm wrong but I'm assuming that the battery will charge but take a longer time to charge but will still show 100% (also will the battery % be completely wrong all the time because the phone doesn't understand the maximum capacity is greater now).
So back to my initial question, do I need to flash a extended battery fix kernel or just calibrating the batteries should work?

As far as extended batterys go, yes you need a kernal which supports it. I'm shopping around for a Yoobao battery and I'm finding out which kernal I need which will support the information for the battery.

Ha_Ha Shoes said:
As far as extended batterys go, yes you need a kernal which supports it. I'm shopping around for a Yoobao battery and I'm finding out which kernal I need which will support the information for the battery.
Click to expand...
Click to collapse
Any luck on finding one? So the battery won't charge to full capacity without the appropriate kernel?
With the kernels I've only found droidzone and I don't particular have the time to test all the different kernels on my phone.
I tried doing the full charge without using a different kernel, I will see the results of this soon hopefully.

It should charge to full but you won't see the real capacity.

Ha_Ha Shoes said:
It should charge to full but you won't see the real capacity.
Click to expand...
Click to collapse
Mine charges to 54% then jumps 100$. It doesn't seem to be giving me the full amount I expected. It charged more once for an hour or two after I let it get to 99% then switched off and charged again. Then booted and let it hit 99% and repeated the process about 3 times. Then I wiped battery stats. Now I'm letting it relearn the whole battery thing. It's dropping fast right now... But I think a few full charge cycles are required.

No. You do.not need a special kernel. Mugen battery's are made to.be used with nonroot phones.
Sent from my Nexus S using XDA Premium App