Database Info

36.5 Hours @ %18 Battery (Slow Charge vs Fast charge)

I am running Continuum v5.6. I have gotten amazing battery life but I do not understand what I do to obtain this. Here is what I did.
So I was getting terrible battery life and decided to recalibrate my battery. After wiping the battery stats after making sure my phone was %100 charged I decided to run the battery till my phone shut itself off. I was getting terrible battery life even after the wipe and everything. In about 24 hours the phone drained itself out with moderate to light use.
I recharged the phone with another USB outlet forcing the phone to charge slowly in USB mode. I believe it charges at 400 mah instead of the usual 700 mah when using the samsung charger. I left it until it charged from 2% all the way to %100.
This was mid Saturday. It is now Monday morning and I am still running on the same charge.
I don't doubt I could have reached up to 48 hours on my Captivate! I've never even came close to 36.5 hours without needing to charge.
What do you guys think gave me such great battery life? I am speculating that when we recalibrate our batteries we should do a SLOW charge. Slow charging batteries have always been the best method in the past IMO.

Possibility. However there are MANY different factors that contribute to battery life.
I would like to see some other confirmed reports of USB charging leading to longer battery life over AC charging.
Interesting stuff though.

Slow charging is always better with batteries. But in over a year i have never used usb to charge. So cant say if it last longer or not. I am a heavy user so no time for a slow charge

seems interesting...ima try this out as soon as i find a charger that charges at a slower speed..

I agree
I am 100% confident slow charging lasts considerably longer.
I normally use the USB on my computer to charge, and I get two days of what I consider pretty heavy use out of it, maybe longer but I'm never away from power for more than 2 days. When I charge with AC it's pretty tough to even last a single day.
Other things help as well. I always have the screen at minimum brightness, I would turn it down further at night if I could. I don't run any home screen widgets that constantly update, no haptic feedback, ect.

I'll have to try this out!

Let me do all the noobs out there a favor and ask how do i slow charge? Where do i get the whatever i need, is it a cable or plug thing and is the stock samsung stuff fast charge i assume?
Sent from my GT-I9000 using XDA App

get one of these http://cgi.ebay.com/USB-Battery-Charger-Samsung-Captivate-SGH-i897-AT-T-/180649905228?pt=PDA_Accessories&hash=item2a0f92cc4c and it'll always slow charge, you'll hardly have to plug the cable in anymore.
Probably want to pick up a second battery.
Gives you a free of mind.

I've been using my captivate with 2.3.3 UCKF1, I charge it with the pc or the original charger and the battery drain very fast .. I think I will have to go back to 2.2.

Will a 500ma usb wall charger with the phone on work. Is that even considered a slow charge?
Sent from my GT-I9000 using XDA App

roadrash7 said:
Will a 500ma usb wall charger with the phone on work. Is that even considered a slow charge?
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
If it invokes the USB mode then yes?
iphone charger does this I think.

SlimJ87D said:
I recharged the phone with another USB outlet forcing the phone to charge slowly in USB mode. I believe it charges at 400 mah instead of the usual 700 mah when using the samsung charger. I left it until it charged from 2% all the way to %100.
Click to expand...
Click to collapse
Are you saying you charged the phone off your computer?

There is some1 that reached 38 hours with moderate use of the phone using my rom , he did say that when charging he used the usb via the pc .

LOSTLOGIC89 said:
There is some1 that reached 38 hours with moderate use of the phone using my rom , he did say that when charging he used the usb via the pc .
Click to expand...
Click to collapse
What is your rom
Sent from my GT-I9000 using XDA App

roadrash7 said:
What is your rom
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
Fasty Rom , check my sig.

I usually charge via USB and I have never been able to get good battery life with any rom. Moderate use has almost always required me to charge the phone twice a day.

LOSTLOGIC89 said:
Fasty Rom , check my sig.
Click to expand...
Click to collapse
i am currently on fasty 1.7, on 34 hrs 9 mins currently with 24 % left. with moderate to regular use, 40 mins on phone, 1 hr display, browsing text messages email checks etc. do i need to update to 1.8 does it have any more battery saving features? i am happy with 1.7

At 30 hours right now with 66 percent remaining. Moderate to regular use, too.

so at that rate, you're going to do 90hrs?
3 3/4 days without a charge.

Isnt this thread about fast charge and slow charge?
Are u people doing a normal charge or slow charge with those great claims?
Im on mosaic rom normal charge just over 34 hours, over 2 hours display 20min call @ 27%.
Just got slow wall charger from link above, gonna drain this tonight then slow charge. Will post results
Sent from my GT-I9000 using XDA App

Charging strategy for Note 10.1 Is there an auto hibernate?

So I'm starting to remember how weird the charging of Note 10.1 is. I left it chargong for a couple hours and it barely charged, course it was on.
Do people "Power off" there notes before they charge it, or just plug it in and walk away?
Is there an app or some setting to auto "hibernate" or even shut off when it gets plugged in and not used? Just seems like an annoying habit to have to power it off regularly.

Note take a long long time to charge 5 - 7 hours for a full charge.

I always care mine while on, usually wifi and it charges from 20% to full in about 5 hours using AC. If you're charging via USB and it's powered on it will barely charge (its charging at 1/4 the current).
If you're using AC and it's still taking that long, you must have a battery hungry app running, try killing a) apps before you charge.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

mine usually takes 5-6 hours to get fully recharged from 15-20%

I usually just leave on in the night. Wake up and it's fully charged.
Deep Grey 16GB N8013

any "speed charger" option? 6hr sounds ridiculous, particular if it's used heavily on the go ...

You're talking about 7000mah of raw power. So this takes some time to charge...this is just plain physics
Sent from my GT-I9300 using xda premium

You may be able to charge faster, I know there's a fix for the SGS3 but faster charging causes more heat which will kill your battery VERY quickly...
Unlike the SGS3 you can't just get a replacement battery and swap out easily... Slower charging will maximise your batteries life....

Yep, forget about charging quickly. The battery is high capacity so it should take maximum 5 hours. It may charge faster with a different adapter but that will shorten your battery life in the long run. If you want, you can buy a battery pack type portable charger I guess...

mailxd said:
any "speed charger" option? 6hr sounds ridiculous, particular if it's used heavily on the go ...
Click to expand...
Click to collapse
As everyone else has mentioned. Charge it at night.

Moto G battery drain.

Hello. My Moto G since I bought it has some major battery issues. It charges very slowly on the USB charger and a range of wall chargers. One night the phone turned itself off within 10 minutes of me putting it down from 35% battery to 0%. Then last night I was charging it and saw it go from 65% to fully charged in a split second. From the moment I unplug it after full charge, it will last 7 hours with moderate use. Mainly msging on whatsapp andbrowsing in chrome. So I do use it a lot in those hours whilst I'm out etc but it seems to drain whilst it's in my pocket with the screen off. The screen on time has never passed 3.5 hours with brightness on lowest.
I don't find that too bad but the random flash drainage and charging of the battery I have experienced is concerning. I mainly have 3G/H+ on and very few apps other than whatsapp and instagram plus chrome. I have tried a factory reset too. The battery usage stats is just my screen And the usual stuff.

I really think you should considering buying a new charger.
Sent from my XT1032 using xda app-developers app

If not a new charger, return it... :S
Sent from my XT1032 using Tapatalk

Agreed, just return it, it's clearly faulty.

techguyone said:
Agreed, just return it, it's clearly faulty.
Click to expand...
Click to collapse
It seems pretty common this battery issues with Moto G, i was considering buying one but now i'm not so sure..

Hmm, today I carged with iPad charger (2A) and after unplug, half hour later (autosync is disabled, no games, no music, no chat etc, all possible apps disabled, not rooted) checking once email the battery level was 87%.
Strange.

I read somewhere that charging at 2A well degrade the battery with the benefit of charging it faster. Is this true?
Sent from my XT1032 using XDA Premium 4 mobile app

shure2 said:
I read somewhere that charging at 2A well degrade the battery with the benefit of charging it faster. Is this true?
Sent from my XT1032 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
There is current limiting built-in, with Li-ion so you won't damage or over-charge.
However, heat generated by long-term charging can degrade the battery....
See this:
Battery Charge Levels
Quite simply, it is not possible to overcharge a cell phone battery. However, leaving it plugged in for more that 24 hours can cause it to overheat, thereby shortening its overall lifespan. Most Li-ion batteries and chargers contain internal circuitry that stops the charging when it hits 100 percent, but always unplug it after long charging intervals, just to be safe.
Read more: http://www.ehow.com/way_5296846_can-overcharge-cell-phone-battery.html#ixzz2nMs18x00
Click to expand...
Click to collapse

Hi,
The battery in my moto g, the system oper. android drain a lot of % usage, 34% more than display in 6h usage.
In most cases this drain over 5 or 10% battery. What can be responsable for this consumption ?
my battery status:
5h usage - 32% screen (1h) sist oper.(35%) 4h
regards

[Q] does energy bypass batery when full charged?

Here is the full question: Does modern smartphones protect the battery making energy bypass baterry when it is full charged? (like most laptops do)
This is related to: is it bad to keep my phone plugged to the wall charged for 15 hours? is it true that doing this makes the baterry go 100%-99%-100% and it "drains" battery's life taking cycles?
Is this the same for all devices? I have a Samsung Galaxy S Advance (i9070)
Thanks!
EDIT: MODS, feel free to delete, i couldn't because there is not such option! I posted this in the wrong sections.
thanks.

The charging circuit lowers the charge to a trickle, to keep battery charged.
I find I can get an hour or two more phone time if I keep charging after it says 100%.
If every thing is working right you shouldn't damage the phone or battery.
Sent from my XT897 using XDA Premium 4 mobile app

Subscribed to this thread as I am very interested in the answer myself.

It is float charging at that point. Battery levels are determined by the battery's voltage. A fully charged lithium ion battery sits at about 4.2 volts while a nearly drained one would sit at about 3.3 volts. This is how your phone knows when to stop charging the battery. So when it gets to the highest point, it stops and lets it trickle out a bit. Then when a little bit of energy has bled off, the charging circuitry kicks back on until it reaches the threshold again. Then the process repeats. It does this to maintain a healthy battery level without overcharging. Hope this helped
Sent from my SGH-M919 using xda app-developers app

PainTrane117 said:
It is float charging at that point. Battery levels are determined by the battery's voltage. A fully charged lithium ion battery sits at about 4.2 volts while a nearly drained one would sit at about 3.3 volts. This is how your phone knows when to stop charging the battery. So when it gets to the highest point, it stops and lets it trickle out a bit. Then when a little bit of energy has bled off, the charging circuitry kicks back on until it reaches the threshold again. Then the process repeats. It does this to maintain a healthy battery level without overcharging. Hope this helped
Sent from my SGH-M919 using xda app-developers app
Click to expand...
Click to collapse
Thanks for the information. Its very informative. :good:
Will constantly charging a phone result in reduced battery life?

Constantly charging a phone will not affect battery life because it's just float charging. Float charging keeps batteries charged but not too charged, drained but not too drained. Of course lithium ion batteries will just eventually wear out because they're good for about 300-400 full charge and discharge cycles. But that's FULL charging and discharging. If it's float charging, the battery will stay good for years.
Sent from my SGH-M919 using xda app-developers app

Charging speed seems slow than expected on Pixel 2

Hi all! My Pixel 2 charges fast(~2700mA) up to first ~20%, then the current changes to 1370mA till almost to 90%, then slows a bit till the 100%. I have used Ampere to check the charging speed. I expected the phone to charge to at least 50% at a fast rate, then slow down a bit.
I recently acquired the device and it had May patch, but then after setting the device up, it prompted me for June patch and I installed it. Don't know if the new update could be the problem.

The phone will take battery temperature into account as well. Do you have a way to monitor that and correlate it with where the current switch points are?
Sent from my Pixel 2 using Tapatalk

DurhamHusker said:
The phone will take battery temperature into account as well. Do you have a way to monitor that and correlate it with where the current switch points are?
Click to expand...
Click to collapse
I charge my phone early in the morning where it was not used all night. No battery drain apps at all. It just charges from almost 0 to 20 percent really fast, but then slows to a steady 1370 mA.

What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk

DurhamHusker said:
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
Click to expand...
Click to collapse
Oh, I see now. Good point. Will try it!

Charkatak said:
Oh, I see now. Good point. Will try it!
Click to expand...
Click to collapse
DurhamHusker said:
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
Click to expand...
Click to collapse
So I did some testing and here is what I see:
Phone starts to charge at a good 2700mA rate for ~ a minute, then slows down to 1370mA. It doesn't really matter if phone has 5% of battery before I start charging or 20% or 40%, the charging pattern is the same. At start the battery temperature is ~32 C and when it charges at 2700 for that first minute or so, the temp rises to ~36 C, then phone drops the charging rate to 1370. Phone is pretty much room temperature and not hot or anything like that. I have 2 Google chargers; One is from original Pixel and the other is from Pixel 2 box. Both do the same thing and charge at the same rate.
There are no abnormal app activity or any battery drain. I am using Ampere app to check mA. Did anyone come across this?

It appears you've discovered the magic battery temperature cutoff that HTC has selected for the Pixel 2 ... and that seems to be around 35 or 36 degrees.
For every 10 C rise in temperature, battery degradation doubles by almost every measurable metric. It doesn't surprise me that at around 35 C your phone appears to limit the charge current ... seemingly to avoid making the battery any hotter. Taking the temperature higher for the charge cycle (or for any other reason) will degrade the battery over time. Deep discharges toward zero also reduce the life of a battery. (Keeping it at 50% or higher is recommended for lithium-ion rechargeable batteries.)
If you can cool the phone down to 25 C before starting to charge, I'd be willing to bet that it will charge at the higher rate for longer. Maybe put a small fan on the phone or set it in front of an A/C vent while it charges and see what happens then.

DurhamHusker said:
It appears you've discovered the magic battery temperature cutoff that HTC has selected for the Pixel 2 ... and that seems to be around 35 or 36 degrees.
For every 10 C rise in temperature, battery degradation doubles by almost every measurable metric. It doesn't surprise me that at around 35 C your phone appears to limit the charge current ... seemingly to avoid making the battery any hotter. Taking the temperature higher for the charge cycle (or for any other reason) will degrade the battery over time. Deep discharges toward zero also reduce the life of a battery. (Keeping it at 50% or higher is recommended for lithium-ion rechargeable batteries.)
If you can cool the phone down to 25 C before starting to charge, I'd be willing to bet that it will charge at the higher rate for longer. Maybe put a small fan on the phone or set it in front of an A/C vent while it charges and see what happens then.
Click to expand...
Click to collapse
That is interesting as I have had different phones which got even warmer than Pixel 2, but still charged at a good rate. I do know that after 80% of charge of so, the charge rate does go down, which isn't a surprise to me. I just picked up my phone, after it was sitting idle for few hours and see that battery/phone temp is 25 C. I will make sure to start charging phone at a low temperature and see if it will keep the fast charge rate longer.
What you mentioned about the "keeping battery at 50% or so). Did you mean that when battery goes down to 50 or so %, charge it? I usually run battery until about 30 or so % before charging it.

Charkatak said:
That is interesting as I have had different phones which got even warmer than Pixel 2, but still charged at a good rate. I do know that after 80% of charge of so, the charge rate does go down, which isn't a surprise to me. I just picked up my phone, after it was sitting idle for few hours and see that battery/phone temp is 25 C. I will make sure to start charging phone at a low temperature and see if it will keep the fast charge rate longer.
What you mentioned about the "keeping battery at 50% or so). Did you mean that when battery goes down to 50 or so %, charge it? I usually run battery until about 30 or so % before charging it.
Click to expand...
Click to collapse
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.

DurhamHusker said:
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
Click to expand...
Click to collapse
I have tried just now to start charging the phone when it is 23 C, but still get the same result. Could it be the June security patch?
Update: So the phone charged by rate of 1370mA from 22% to 100% in 1h 25m. So going from 0 to 100% should take ~1h 45m? Can anyone confirm how long it takes to charge Pixel 2 using original charger?

DurhamHusker said:
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
Click to expand...
Click to collapse
Go a reference to these studies?
This app vendor has seen a lot and isn't convinced discharging to low values has much material effect on battery service life. Charging to high levels does, however. Interesting read I think... with commentry on the often quoted Battery University pages. I agree that heat isn't good whatever.
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article

WibblyW said:
Go a reference to these studies?
This app vendor has seen a lot and isn't convinced discharging to low values has much material effect on battery service life. Charging to high levels does, however. Interesting read I think... with commentry on the often quoted Battery University pages. I agree that heat isn't good whatever.
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article
Click to expand...
Click to collapse
I can't point to anything peer reviewed or funded by the NSF ... so maybe 'studies' is the wrong word.
I've seen the Battery University articles and they've seemed believable to me. It's possible they're flawed. I've also seen articles from these guys - https://www.mpoweruk.com/life.htm ... and other tech writers who corroborate such claims. I've also seen the claims about the high level charging you're pointing to and some who suggest you should keep your battery between 50% and 85% all the time to get the most out of it.