Database Users

Maximum Battery Charge

Just wondering, when your Nexus One battery is fully charged, what's the maximum mAh you can achieve? (Look in /d/battery_log)
I'm nitpicking perhaps, but I'm curious. The Nexus One batter is supposed to be 1400 mAh, but the max I've seen it charged to is 1368 mAh, and this was less than 1 week old. Yeah, I know, just shortchanged a little bit.
I'm quite used to the fact that on a few MacBooks/MacBook Pros I've had, the actual battery capacity is more than the specified capacity. E.g. on my MacBook Pro right now, it's 5450 mAh battery can actually hold 5597 mAh.
So, how does your battery fare?

depends on how you use different applications...

Log shoes 1366 is the best I have had (with what I can see).

I got mine on launch day, and full charge is 1347 for me now. With CM 5.0.4 I use about 5-8%/hr while idling according to Android Battery Dog, giving me easily > 12 hrs of life, usually around 16.

How are you guys testing this?

uansari1 said:
How are you guys testing this?
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^
10chars

Talderon said:
Log shoes 1366 is the best I have had (with what I can see).
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Ok, so I'm not alone with an under-performing battery
lolobabes: I'm referring to the maximum charge the battery will hold. It should not depend on the applications I use.
uansari1: In "adb shell", run "cat /d/battery_log" and look at the uAh column.

Battery Comparison.

I'm going to be a useful XDA Member!
I bought a genuine Galaxy S 4G battery which is rated at 1650mAh. It's Samsung Branded, says 1650mAh and everything!
So I decided to see how much, if any, improvement there actually is. I was doing this for my own purposes, but I decided I'll share results with you guys too! I'm going to drain both the batteries doing the exact same test, and time them! Simple enough, right?
Configuration of the test:
-SRF Frozen 1.1.1 ROM with included Twlight Kernel. Undervolted (Forgot settings, will post when change batteries)
-Display at 100% Brightness
-Bluetooth on
-Wi-Fi Off
-Background Data off
-Auto-sync off
-GPS On
-Streaming THIS youtube video on the desktop site using Dolphin HD with Flash 10.3 plug-in
http://www.youtube.com/watch?v=CsA9PhnYASQ&feature=player_detailpage
I'll update when the battery dies. =D
Update:
So I got my results ready... Took a while but BAM:
1500mAh battery lasted 1 hour and 58 minutes.
1650 mAh battery lasted 2 hours and 16 minutes.
I will have to see how real world use is, but this is pretty encouraging considering I was just trying to kill this battery as fast as possible. I was pretty skeptical about this battery ACTUALLY being 1650mAh, even though it is genuine Samsung, but it is!
So if you guys want better battery life, and no extended back, I'd say spring for a Galaxy S 4G battery.

Yippeeee, I cant wait to see the results, im sooooo exited. I bet the 1650mah lasts just a little bit longer but thats just my wild guess.

Are you calibrating the batteries beforehand? Well running them out calibrate them and make better results in a second round of tests?
Sent from my SPH-D700 using XDA App

Hypnotic2010 said:
Yippeeee, I cant wait to see the results, im sooooo exited. I bet the 1650mah lasts just a little bit longer but thats just my wild guess.
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Pretty ignorant and condescending. =)

The Root said:
Are you calibrating the batteries beforehand? Well running them out calibrate them and make better results in a second round of tests?
Sent from my SPH-D700 using XDA App
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The 1500 mAh one was calibrated, but the 1650 one was not. If it's really important to you, I can do this tomorrow or another day I have time, I just don't have the patience to stare at my phone anymore, I want to use it. xP

Sprintguy1376 said:
The 1500 mAh one was calibrated, but the 1650 one was not. If it's really important to you, I can do this tomorrow or another day I have time, I just don't have the patience to stare at my phone anymore, I want to use it. xP
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I hear you, but if you want this to be a helpful thread this test needs to be done in a scientific manner. Successful science and patience rarely combine well. Please calibrate both or else it's more apples to oranges than it already will be. Technically, I wish this was a brand new phone with a stock battery being first calibrated and the replacement battery being put through the same circumstances at the same time.
Edit: specifying what the heck i'd want

Seems about right.
118 minutes for the 1500mah
vs
136 minutes for the 1650mah
That is a 15% increase.
The 1650 is 10% bigger than the 1500mah battery at advertised mah ratings. I am guessing you have had your 1500mah battery in use for a few months at least. Lets assume that it has diminished to 90% capacity from the new state of around 97% rated capacity which would be ~4-6 months of use. That means your 1500mah would be 1350mah.
Your 1650 is really 1600mah new most likely (97% rated).
That would make your 1650mah battery's real capacity around 18.5% larger than the 1500mah battery's real capacity, which is right in line with your test of around a 15% improvement.
Not pulling these numbers totally out of my ass BTW. www.batteryboss.org

muyoso said:
Seems about right.
118 minutes for the 1500mah
vs
136 minutes for the 1650mah
That is a 15% increase.
The 1650 is 10% bigger than the 1500mah battery at advertised mah ratings. I am guessing you have had your 1500mah battery in use for a few months at least. Lets assume that it has diminished to 90% capacity from the new state of around 97% rated capacity. That means your 1500mah would be 1350mah.
Your 1650 is really 1600mah new most likely (97% rated).
That would make your 1650mah battery's real capacity around 18.5% larger than the 1500mah battery's real capacity, which is right in line with your test of around a 15% improvement.
Not pulling these numbers totally out of my ass BTW. www.batteryboss.org
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Yay! Science worked! Now to test 1000 more times to avoid the small sample size argument. No, but really this thread just turned the helpful corner and I'm considering.
Edit: spelling (tori)

restarting repeatedly harmful?

so I bought the phone few days ago and the first thing I did was to empty the battery as advised, at about 20 % I was sleepy as hell and I wanted to drain the battery faster so the first thing came to my mind (and I regret that) was restarting the phone repeatedly so it would drain very fast , and I blindly did so , what a stupid idea! I did an approximate number of 15 restarts I guess with about 2 mins between each restart, sooo I am ready to take the consequences so what are they? what should I expect for the next few days? battery failure,cpu failure, ram failure, or even software failure?? the first 2 things I notice the battery now drain a little bit faster and the phone gets warmer faster than before

I don't think this will cause any harm at all. It's not like the phone takes a voltage surge during start up.
OTOH, there's no benefit to "conditioning" a lithium ion battery. If anything, it's counterproductive. Li batteries don't like being fully discharged or overcharged. Keep it between 25% and 75% as much as possible, and it will last the longest.

meyerweb said:
I don't think this will cause any harm at all. It's not like the phone takes a voltage surge during start up.
OTOH, there's no benefit to "conditioning" a lithium ion battery. If anything, it's counterproductive. Li batteries don't like being fully discharged or overcharged. Keep it between 25% and 75% as much as possible, and it will last the longest.
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OMG thank u so much I was so worried cos I have a bad history of damaging and breaking stuff especially electronic stuff so u don't recommend me to fully charge it? 75% for maximum?? and rebooting is it safe in general?

Charging it fully won't really hurt anything. The phone's circuitry won't let the battery overcharge. But the battery will probably have a slightly longer life if it doesn't get charged to 100% all the time. Battery life is good enough that I can generally take mine off the charger at around 75% and can still get a full day out of it. But if I leave it on to 100% I don't worry about it. And if you like to charge yours overnight and it always goes to 100%, don't worry about that, either.
And yes, it's perfectly fine to reboot the phone. I generally reboot mine every couple of weeks. It seems to clear out some of the stuff that builds up in memory and runs a little smoother.

No, but draining the battery does, especially draining it fast.
When will these stupid myths about a totally different and obsolete battery technology die?

meyerweb said:
Charging it fully won't really hurt anything. The phone's circuitry won't let the battery overcharge. But the battery will probably have a slightly longer life if it doesn't get charged to 100% all the time. Battery life is good enough that I can generally take mine off the charger at around 75% and can still get a full day out of it. But if I leave it on to 100% I don't worry about it. And if you like to charge yours overnight and it always goes to 100%, don't worry about that, either.
And yes, it's perfectly fine to reboot the phone. I generally reboot mine every couple of weeks. It seems to clear out some of the stuff that builds up in memory and runs a little smoother.
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thank u for the information, I appreciate ur help

jacobgong said:
No, but draining the battery does, especially draining it fast.
When will these stupid myths about a totally different and obsolete battery technology die?
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now I believe it's a myth too, but hey aren't some apps like games considered as battery-hungry apps? they drain batteries so fast too!!

I hope this is a joke..
Sent from my Star-Tac

jack1001 said:
now I believe it's a myth too, but hey aren't some apps like games considered as battery-hungry apps? they drain batteries so fast too!!
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Lithium-ion batteries degrade predictably throughout usage cycles, so the more you use them the more you reduce their total capacity. They're also more vulnerable to such degradation while under high temperatures, like when you drain them very fast by restarting the device. And yes, also if you're playing games. Obviously there's no point in getting a nice phone if you're not even gonna use it, but you can choose to spend those battery cycles on meaningful usage like playing games, rather than pointlessly restarting the device.

This is a classic example of thinking too hard. Just use and enjoy the phone and charge it when it needs charging.

Brava27 said:
I hope this is a joke..
Sent from my Star-Tac
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unfortunately it's not, but what is ironic? the question itsels or what I did?

daz_2000 said:
This is a classic example of thinking too hard. Just use and enjoy the phone and charge it when it needs charging.
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sensible words,I will,thank you

Battery capacity less than it should

Hey all,
2 days ago, I got my Op5. Very happy with the phone, except for one thing : accubattery says that the capacity is just beneath 3100mah, instead of the 3300mah it should have. I let it run down and charged it to 100% and kept it on the charger for about one hour after that, still around 3100mah, according to accubattery.
How are your batteries? I'd like to know if this is a widespread issue.

How do you know that accubattery is correct?
Alan

Same here, but even lower. After 42 cycles is around 3000 mAh.
alan sh said:
How do you know that accubattery is correct?
Alan
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Well, since it is measuring the amount of current going in the actual battery, after some cycles you can assume with quite confidence the actual battery capacity. Besides, it will actually plot the measurement, so you can actually see if the data makes sense.
I'm curios also about the actual capacity, because this would be an indicator of why I have seen so much variation about the battery life on different handsets.

Man, I really don't care. Best battery life ever! (I came from OP3 and OP2 before that)

Rodomar705 said:
Same here, but even lower. After 42 cycles is around 3000 mAh.
Well, since it is measuring the amount of current going in the actual battery, after some cycles you can assume with quite confidence the actual battery capacity. Besides, it will actually plot the measurement, so you can actually see if the data makes sense.
I'm curios also about the actual capacity, because this would be an indicator of why I have seen so much variation about the battery life on different handsets.
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This app shows significantly lower capacity in almost all phones. To determine capacity you have to discharge battery completely (which is not 0% reported by system) and charge it with precise measurements (5 seconds sampling rate like Accubattery isn't enough). This app is like cancer. This is fourth thread in last two weeks about this **** app. Only things it does well is reporting false data gathered by pseudoscience method and drain battery by wakelocks. Do you need to mess up with battery stats? Get Google battery historian.

davfiala said:
This app shows significantly lower capacity in almost all phones. To determine capacity you have to discharge battery completely (which is not 0% reported by system) and charge it with precise measurements (5 seconds sampling rate like Accubattery isn't enough). This app is like cancer. This is fourth thread in last two weeks about this **** app. Only things it does well is reporting false data gathered by pseudoscience method and drain battery by wakelocks. Do you need to mess up with battery stats? Get Google battery historian.
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So, how some users like the one above achieve 8h SOT while others like myself neither 5. I'm even never play games almost, which is typical a drain source on phones.
Inviato dal mio iPad utilizzando Tapatalk

Rodomar705 said:
So, how some users like the one above achieve 8h SOT while others like myself neither 5. I'm even never play games almost, which is typical a drain source on phones.
Inviato dal mio iPad utilizzando Tapatalk
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There is no typical drain source. Everone has different apps installed, different usage, different settings... etc. I can achieve 8h SOT or 2h SOT too. Do you really think, that 10% of reported battery capacity loss would make 60% higher difference in SOT?

davfiala said:
This app shows significantly lower capacity in almost all phones. To determine capacity you have to discharge battery completely (which is not 0% reported by system) and charge it with precise measurements (5 seconds sampling rate like Accubattery isn't enough). This app is like cancer. This is fourth thread in last two weeks about this **** app. Only things it does well is reporting false data gathered by pseudoscience method and drain battery by wakelocks. Do you need to mess up with battery stats? Get Google battery historian.
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Click to collapse
Thanks, I didn't know this app is that unreliable.

Fully Charge Battery

Hello,
I read in the internet that is not recomended charge 100% the phone's battery. It's about the battery life. I want to know if it is really true....
Sorry my bad english :cyclops:

Maybe if you want to keep the phone for 5 years you'll notice a difference in battery life by keeping it charged between 20-80% but rarely does anyone do this.

True? Yes, it is. In the same way that it's true that a (properly done) overclock on a CPU will shorten it's lifespam. Yes the overclock will shorten the CPU's lifespam, from 20 years to maybe 15.
Your battery will degrade regardless but by the time it becomes an issue, you'll probably have moved on to a new phone anyway.

peachpuff said:
Maybe if you want to keep the phone for 5 years you'll notice a difference in battery life by keeping it charged between 20-80% but rarely does anyone do this.
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But charging the battery in only 80% means that I will have less SOT before charge again

Tony_Starkus said:
But charging the battery in only 80% means that I will have less SOT before charge again
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The theory behind this apparently is that how battery likes to be in certain battery levels based on the voltage.
Based on what I understand, the phone/battery likes it better if battery is not less than 20 and not more than 80.
This means that if you charge between 20 - 80, you can have a lot more charge cycles as compared to 0 - 100. This could also mean that the battery can last longer in terms of longevity.
But as mentioned, not many people does that unless they are looking to keep their phone for more than 3 years.
These are based on my limited understanding and my own experiences.
You can google battery university if you need more info.

Tony_Starkus said:
But charging the battery in only 80% means that I will have less SOT before charge again
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albel said:
The theory behind this apparently is that how battery likes to be in certain battery levels based on the voltage.
Based on what I understand, the phone/battery likes it better if battery is not less than 20 and not more than 80.
This means that if you charge between 20 - 80, you can have a lot more charge cycles as compared to 0 - 100. This could also mean that the battery can last longer in terms of longevity.
But as mentioned, not many people does that unless they are looking to keep their phone for more than 3 years.
These are based on my limited understanding and my own experiences.
You can google battery university if you need more info.
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Most of the information here is correct I have an am always doing battery tests research and such
80% and 20% are the magic number for maximum overall life of a battery...
Also no on mentions heat and cold also degrades the cells inside
I also recomend if you make it through the day shutting off fast charge......
If you think about it it is simmilar to any other battery,
Take a car for example I know i know lead battery vs lith ion but slow charging is the best method for any types of battery life in the long run.... it does not excite any of the ions as much as fast charging......
Fast charging on auto batteries is what we call a surface charge it quickly excites the electrons for a quick zap of juice but then over all that spreads out among all of the rest of the electrons quickly draining and shortning over life....
Slow charge generates less heat as well as does what we call a deep charge....Which is better of coarse I have had automotive batteries say like in my eclipse its 9 years old and it was a 800 amp battery and even after 9 years now
It retains over 650 amps on battery tests because i slow charge it once a month for a couple days be it need it or not..
Also if you guys are over worried and snap dragon try part cyborg rom the engineering kernel used by samdung only allow for a 80% charge.....I get more screen on time than stock on less charge because it is optimized so well....any where from 6 to 8.5+ hours and that is more than enough more my needs....
Also wireless chargers generate heat which degrade life on batts cells.....
I can get way more into detail on any of these if any one wishes

TheMadScientist said:
Most of the information here is correct I have an am always doing battery tests research and such
80% and 20% are the magic number for maximum overall life of a battery...
Also no on mentions heat and cold also degrades the cells inside
I also recomend if you make it through the day shutting off fast charge......
If you think about it it is simmilar to any other battery,
Take a car for example I know i know lead battery vs lith ion but slow charging is the best method for any types of battery life in the long run.... it does not excite any of the ions as much as fast charging......
Fast charging on auto batteries is what we call a surface charge it quickly excites the electrons for a quick zap of juice but then over all that spreads out among all of the rest of the electrons quickly draining and shortning over life....
Slow charge generates less heat as well as does what we call a deep charge....Which is better of coarse I have had automotive batteries say like in my eclipse its 9 years old and it was a 800 amp battery and even after 9 years now
It retains over 650 amps on battery tests because i slow charge it once a month for a couple days be it need it or not..
Also if you guys are over worried and snap dragon try part cyborg rom the engineering kernel used by samdung only allow for a 80% charge.....I get more screen on time than stock on less charge because it is optimized so well....any where from 6 to 8.5+ hours and that is more than enough more my needs....
Also wireless chargers generate heat which degrade life on batts cells.....
I can get way more into detail on any of these if any one wishes
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Click to collapse
Have just started reading about s8 stuff and have not rooted yet. Does the kernel allow you to set maximum charge? I remember back on sgs1 specific kernels allowed this but haven't seen it much since then

c-pimp said:
Have just started reading about s8 stuff and have not rooted yet. Does the kernel allow you to set maximum charge? I remember back on sgs1 specific kernels allowed this but haven't seen it much since then
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no samsung preset it at 80% and since the bootloaders locked no way to modify it

Ahh I see. Thanks for clearing that up. Looks like since I'm on oreo now I'm stuck without root so I won't be playing with any of that stuff. Have a good one!