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Serious battery capacity decrease

Hi, I just ran powercfg /batteryreport in CMD. The generated report states that after 30 charge cycles, my full charge capacity has dropped to 27,646mWh. the designed capacity is 31,502mWh, so my battery lost 12% of capacity in just 2 month!!
does your surface also suffer from serious battery capacity decrease? please run "powercfg /batteryreport" in non-elevated CMD and look at the report in C:\Users\*username* please post your result including full charge capacity and charge cycles.
Thanks!

mine is unchanged, reporting 16 cycles. I got the Surface 12/17 so I'm a week shy of two months myself.
I don't let my LiOn batteries deep cycle (drain down past 20%) if at all possible, as this reduces their lifespan.

Yeah my battery report says the same thing, even though I haven't noticed any lifespan decrease yet.

Mine has also dropped from 31,502 to 30,444 and 3 power cycles. Surely the battery can't be degrading already?!

At 34 cycles, mine has settled from 31.502 Wh to 30.214 Wh. It is very slowly losing capacity still (was at 30.740 for a few weeks in January) but seems to be mostly holding steady. The noticeable drops correspond to deep discharge cycles; I'll endeavour to avoid those.

Mines at 28472 with 38 charges. I got mine at launch 10/26/12. This is scaring me. Coincidentally I have noticed a decrease in battery life and was wondering if it had to do with the jailbreak as that is when I started noticing it.

47th cycle now, I still have 30,281mWh. I got my Surface RT at around 25th Dec.

29,415 after 47 cycles. Pre-ordered mine, arrived around launch date. This does seem very weird, batteries really shouldn't do that. Anyone have any experience with getting one replaced? Hopefully this isn't a problem Microsoft wont acknowledge.

cant seem to find my stats.. it only says mwh without numbers.. what the hell?

Mine seems to be worst here. After 24 cycle count, I'm down to 26,729. I do let the battery drain all the way - may be that's my problem.
I've had my Surface since Oct of last year.

mr_dan said:
cant seem to find my stats.. it only says mwh without numbers.. what the hell?
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Me to ....?

Montastic said:
Mine seems to be worst here. After 24 cycle count, I'm down to 26,729. I do let the battery drain all the way - may be that's my problem.
I've had my Surface since Oct of last year.
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That might be the issue perhaps, I have never allowed my battery to drain 100% or 100% charged for too long.
Mine is still at 30k range despite 49th cycle

I am extremely upset about this - in only 25 cycles, my battery capacity has gone from 31,502mWh down to 24,154mWh. And to top it off, I have been wondering why it seems the battery life isnt that good anymore. Is this permanent, or can you condition your battery by not allowing it to drain as much?
I have been letting it drain all the way down, and when i charge it, i plug it in overnight. Obviously this is the wrong way, WTF - you would think that they would tell you about this in manual, etc.

To be fair, this has been common knowledge for literally as long as laptops have been using Li-Ion batteries (well over a decade). I agree that it should perhaps be better documented for those who have somehow never before encountered a LiIon battery, but acting like this is some never-before-heard-of consequence of hard-draining your battery is... weird.
Leaving it plugged in all night is fine; the charger is pretty smart about handling that. Just try not to let the charge level drop below 10% (ideally, not below 20%, just for some safety margin) and you should be fine.

LastBattle said:
or 100% charged for too long.
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The charging system is smart enough to not overcharge, so you don't need to worry about this.
No one should be "reconditioning" or deep cycling batteries anymore - at least not if they are LiOn/LiPoly.

Got mine 11/4, 22 cycles, down to 25,xxx. Pretty disappointing considering I don't let it die all of the way. I'm hoping this is just an OS reading issue.

guitar1969 said:
Mines at 28472 with 38 charges. I got mine at launch 10/26/12. This is scaring me. Coincidentally I have noticed a decrease in battery life and was wondering if it had to do with the jailbreak as that is when I started noticing it.
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I turned off all low battery alerts and forced the battery to run completely dead, and recharged, and now mine has gone up a few points to 28,579 from 28472, with 39 charges, so I think it needs to be reset once in awhile. I however was not aware that leaving it to charge all night and using while plugged in could hurt the battery as others said - Still question that logic. I also have used it to the point of turning off but because Win8 has adjustible power options to force it to turn off when it reaches a certain battery level, I am not sure any of us run the battery down to nothing.
i just wish we could get a stupid battery ap/utility that would tell us battery life left in percentage or something to help us monitor it better.

i just wish we could get a stupid battery ap/utility that would tell us battery life left in percentage or something to help us monitor it better.
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+ 1000

Got mine on release, I've fully discharges mine about 3 or 4 time mistakenly, cycle count 49, full charge capacity 29,985, given this I've altered my battery plan to give a warning (low battery level) at 20% rather than 6% and to shut down (critical level) at 15% rather than 3%.
Oddly enough, my battery plan has never been adjusted so theoretically it should never drop below 3% yet my battery report clearly identifies it dropping to 1% at one point.

So, are you guys telling me that I should try letting it drain down to 0 and then recharging it to see if it is simply an issue with calibration?
Sent from my Windows 8 device using Board Express

Does anyone else's max stay on 1% battery for hours?

So my maxx will drain to 1% battery in about 3 days with 3 hours screen time. The thing is once I hit 1% it can stay on 1% and not shut off for hours. Right now its been on 1% for about 7 hours, I have a youtube video going just to see how much longer it will go. Its been playing a youtube video now for about 20 min on 1%.
I just got this phone last week, is this because the system hasn't fully calibrated the battery? Or is the battery defective in some way? Its kind of annoying because you think you are out of battery but it keeps going so I don't really know how much battery I have.

Definitely not normal. I'd do a factory reset to eliminate a software issue and if the issue persists seems like it must be a hardware issue, exchange it

These sound like calibration issues. Can you fully charge your battery and then leave in on the charger for awhile -- like an hour or more? That should calibrate it correctly.

I have never nor will ever let my battery get that low. These batteries don't like to be drained and then fully charged it's not healthy for the battery. I don't let my battery go below 30 to 40 percent if I can help it. Most of the time I let it get to about 50 percent then I charge it.

bigv5150 said:
I have never nor will ever let my battery get that low. These batteries don't like to be drained and then fully charged it's not healthy for the battery. I don't let my battery go below 30 to 40 percent if I can help it. Most of the time I let it get to about 50 percent then I charge it.
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not to be rude but where is you information or evidence backing your statement? this goes against everything i know and i certainly always allow my battery to fully die then i fully charge it over night while it is off, i believe charging at 40 percent fools the battery into thinking that is the end of the battery's daily life span and therefore dying prematurely due to it believing that 40 percent is the end.
I do not have any real evidence except i've gotten exceptional battery life with my Ultra after allowing a full cycle (draining all the way and then fully charging while powered down)...i have gotten just under 32 hours with 4 hours and some odd minutes screen on with about an hour of voice calls and random other usage such as tapatalk browsing, internet, texting and maybe some email or youtube....i occasionally play some games like the new CoD Strike Force

ahjee said:
not to be rude but where is you information or evidence backing your statement? this goes against everything i know and i certainly always allow my battery to fully die then i fully charge it over night while it is off, i believe charging at 40 percent fools the battery into thinking that is the end of the battery's daily life span and therefore dying prematurely due to it believing that 40 percent is the end.
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The best source is battery university. Here are a few good links. In the first, look at the third column (Li-ion), as that's the battery pack in the Maxx/Ultra/Mini
http://batteryuniversity.com/learn/article/how_to_charge_when_to_charge_table
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
From the second link (emphasis mine):
Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The shorter the discharge (low DoD), the longer the battery will last. If at all possible, avoid full discharges and charge the battery more often between uses. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles to prolong life, other than to calibrate the fuel gauge on a smart battery once in a while.
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doogald said:
The best source is battery university. Here are a few good links. In the first, look at the third column (Li-ion), as that's the battery pack in the Maxx/Ultra/Mini
http://batteryuniversity.com/learn/article/how_to_charge_when_to_charge_table
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
From the second link (emphasis mine):
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And boom! All the I have known through all the androids I have has been wrong lmao. I really appreciate you posting this....all the years of trolling forums and reading what everyone is doing or have done to get their battery to last long for a daily cycle...appreciate this.
Sent from my XT1080

So happy I seldom charge up to 100% and leave it sit. I also never let it get super low.
Sent from my XT1080m using Tapatalk

Coming from a Gnex, I have a charger within 3 feet of me everywhere I go. I'm trying to break myself of the habit of plugging it in but mine still gets a charge at some point during the day, if only in the car. It has always been my practice to let my phones run down almost to dead maybe once every couple of months. I feel like it keeps the phone's battery meter calibrated although I have nothing to base this on.
Sent from my XT1080 using Tapatalk

Charging from 99% to 100% seems to take long

I noticed this on my old S4 as well. 99% took the longest to charge up to the next %. Anyone know why this is? My phone was charging at 99% for like 15 minutes. I also noticed that using the phone from 100-99% goes very quick :laugh:

OnSugarHill said:
I noticed this on my old S4 as well. 99% took the longest to charge up to the next %. Anyone know why this is? My phone was charging at 99% for like 15 minutes. I also noticed that using the phone from 100-99% goes very quick :laugh:
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This is perfectly normal. Think of it as inflating a balloon. The last 1% will be really hard and yet it will deflate as fast as the rest. It is not recommended to push that last 1% too often. Ideally you want to stay between 30-70%.

pintycar said:
This is perfectly normal. Think of it as inflating a balloon. The last 1% will be really hard and yet it will deflate as fast as the rest. It is not recommended to push that last 1% too often. Ideally you want to stay between 30-70%.
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Do you have a source for that?

poldie said:
Do you have a source for that?
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He is correct some say 20-80%, best example is Samsung laptops, mine had an option in the bios of topping charge of at 70% to prolong battery life.
http://batteryuniversity.com/learn/article/do_and_dont_battery_table

Check out my recharge experiments: http://forum.xda-developers.com/z3/general/xperia-z3-battery-life-recharge-t2916773

I heard somewhere that is a solution so battery dont became overcharghed.
And what kills battery capacity is if it became static. There must be electricity flow trought battery to prolong it life time.

Your only supposed to charge your phone to no more then 70%?? First i heard. Never heard that before, Interesting.

Blaalad12 said:
Your only supposed to charge your phone to no more then 70%?? First i heard. Never heard that before, Interesting.
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I looked into the same thing last month.
https://discussions.apple.com/thread/4465051?tstart=0
When possible avoid frequent full discharges. Instead, charge the battery more often. There is no concern of battery's memory when applying unscheduled charges. A high residual charge before recharge is a benefit rather than a disadvantage for chemistry of Li-Pol battery on all iPads. The best way is to keep battery between 40% and 80% charged. After LiP battery of iPad is charged to 80% capacity it switches to trickle charging with a potential to cause plating of metallic lithium, a condition that renders the cells unstable. One more incentive to keep battery of iPad between 40-80% is the rate of the charge loss when gadget is not in use. The charge loss amounts up to 6% per year when battery is fully charged, but only 2% per year when it is half-charged. Nevertheless, short discharges with following recharges do not secure the regularly calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30-40 charges fixes this problem.

Battery life, how is your phone doing?

Wondering how is your battery life, I'm 5:30 hours for 54% of battery(75% - 21%)
I max charge it to 75% and usually I don't drain it less than 25% - To achieve the best battery life long term, so I won't need replacement anytime soon. Also I don't fast charge, usually 1A charging or similar(e.g. Wireless charging 7.5W)
Obviously I use underclocking to the point I don't fee any difference in daily usage
Share your thoughts, for 0-100% I bet I can do more than 7:30 SOT

evronetwork said:
Wondering how is your battery life, I'm 5:30 hours for 54% of battery(75% - 21%)
I max charge it to 75% and usually I don't drain it less than 25% - To achieve the best battery life long term, so I won't need replacement anytime soon. Also I don't fast charge, usually 1A charging or similar(e.g. Wireless charging 7.5W)
Obviously I use underclocking to the point I don't fee any difference in daily usage
Share your thoughts, for 0-100% I bet I can do more than 7:30 SOT
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Lol mate you're more like 5:30 min after 75-25 twice.
Such a bad battery life usually happens after using mokee as they change low lever instructions in the processor.
What happens is that the processor microcode is changed such that instead of power being managed by the relative motion of conductors and fluxes, it’s actually now managed by the modial interaction of adreno-reluctance and capacitive directance of the cores. You can not change that any more as it was a change on hardware level microconductions that can not be reverted.

malimukk said:
Lol mate you're more like 5:30 min after 75-25 twice.
Such a bad battery life usually happens after using mokee as they change low lever instructions in the processor.
What happens is that the processor microcode is changed such that instead of power being managed by the relative motion of conductors and fluxes, it’s actually now managed by the modial interaction of adreno-reluctance and capacitive directance of the cores. You can not change that any more as it was a change on hardware level microconductions that can not be reverted.
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50%(75-25% usage) of battery gives me 5:30 SOT hours and it's bad?
You troll right? this is only achieved with underclocking, at 100% you should expect more than 7:30 and maybe 8 hours! what about you?
P.S. Give me your SOT 75-25% and if it's more than 5:30 SOT I'll send you my phone for free - Bet you can't even do 6 hours SOT with full battery

just look at the screenshot you provided yourself, the battery graph clearly shows you charged your phone after you hit 25% the first time to 75% and let it run down to 21% again. battery (and sot) stats won't reset until you charge over 90%, so your reading of 5.5 hours of sot is actually 2 instances of your habitual 75-25% drain. in reality you are only getting about half that for 50% use (~2h 45min sot), which I'd say isn't too bad, but maybe you should do a full 100% to 0% use once and see how the battery fares for a more accurate reading. honestly I would say you would still get around 5.5-6 hours sot from that, and that unless you do some serious tweaking to both your phone and usage patterns you wouldn't be able to hit 7 hours sot, but I would be willing to see evidence that proves me otherwise.

NightRaven49 said:
just look at the screenshot you provided yourself, the battery graph clearly shows you charged your phone after you hit 25% the first time to 75% and let it run down to 21% again. battery (and sot) stats won't reset until you charge over 90%, so your reading of 5.5 hours of sot is actually 2 instances of your habitual 75-25% drain. in reality you are only getting about half that for 50% use (~2h 45min sot), which I'd say isn't too bad, but maybe you should do a full 100% to 0% use once and see how the battery fares for a more accurate reading. honestly I would say you would still get around 5.5-6 hours sot from that, and that unless you do some serious tweaking to both your phone and usage patterns you wouldn't be able to hit 7 hours sot, but I would be willing to see evidence that proves me otherwise.
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Battery Charge Limit - Resets your stats but also limits the charging
I know you are clueless but talking without knowing is bad - 5.5 is for 50% battery due to high underclocking I've got
With 100% I can get over 8-10 hours - High end CPU cores are not more than 1.5Ghz, gpu at power saving but also lowest possible freq for min/max - You are talking crap but ok I won't feed you, I stop feeding trolls the moment I get they troll

sorry but you are the one talking crap, please see attached picture, which is a crop of your battery graph. i personally also use the battery charge limit app, and i know how the reset battery stats option in the app works, which will clear the battery graph as well. if you really did clear battery stats you wouldn't be able to see this upward curve.
how about this, you fully charge your phone and use it normally until you hit your claimed 8-10h sot. honestly i think i can match your sot, but without this underclocking you highly praise.

You're either braindamaged or a troll. You charged your phone and it didn't reset stats so it combined both usages. Did you pass 6th grade maths? Anyways SoT is subjective and you're just being extra petty about this

10 hours SOT

pijes said:
10 hours SOT
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Only 10?
By doing a small mod on the battery, I get like 12 hours minimum, with 50% brightness fixed. What I did is that I replaced the main-winding of the normal Lotus-O-Deltoid type and placed it in the pan-indermic semi-boloid slots of the battery.

pijes said:
10 hours SOT
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Really 10 hours HOW????

silvergt2 said:
Really 10 hours HOW????
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Removed lots of bloatware using adbFastboot tool and connected mostly on wifi. Without wifi with medium usage, I can get around 6 hours SOT within 2 days of use.

aex + canting.

I've had mine for 18 months and am still very pleased on the charge. I can typically get 12 - 14 hours fine, and that does me for most uses. I've seen it go longer when I've used it less (for example right now 20 hours without charge - 6% left, although that would include about 7 hours of sleep so no use in that time).
No modifications on my part.

Question Battery drain fast when reach 6%

My battery drains quickly when reached 6%, and drops after a minute to 5%, few seconds to 4%, 3%, 2% 1% and the samsung logo appears just as soon as possible.
Also when full charged to 100%, it will drop to 97% just in few minutes!

hello, this is normal(i think) same situation with S21 and S21ultra i have, quick drop few% from 100% and under 7% also unpredictable drop to 0.

vlubosh said:
hello, this is normal(i think) same situation with S21 and S21ultra i have, quick drop few% from 100% and under 7% also unpredictable drop to 0.
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from iphone 12 pro max to this phone, and really feel its weird

czw2002cn said:
from iphone 12 pro max to this phone, and really feel its weird
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battery management on both devices are different. for example I had an iphone 13 pro max and battery would stay at 100% for so much longer than the s22 ultra, but then the drain would happen a tad faster. Also the running apps play a role in draining after certain levels. powering up a device this type does take a lot of power. Did you try power saving options after reaching a certain power level?

Also not a good practice to allow the battery to get that low. Battery longevity will be compromised.

hand-filer said:
Also not a good practice to allow the battery to get that low. Battery longevity will will be compromised.
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This is also important. and if for some reason you can't charge and you are getting to 15%, enable battery saving and if you get below 10 use Ultra battery saving.

some experts suggest it is a good measure to let the battery drain to 0 once or twice to get calibrated. It shows 5% but it might actually be a lot lower than that, hence the sharp drop to 0. It should in theory be better after "calibration". And of course, battery longevity will be compromised by anything you do to it, whether it's charging to 100% or draining to 0%. For calibration you do this once or twice.

derausgewanderte said:
some experts suggest it is a good measure to let the battery down to 0 once or twice to get calibrated. It shows 5% but it might actually be a lot lower than that, hence the sharp drop to 0. It should in theory be better after "calibration". And of course, battery longevity will be compromised by anything you do to it, whether it's charging to 100% or draining to 0%. For calibration you do this once or twice.
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They're not experts. Lithium-ion batteries do not require recalibrating. Discharging to 0 is extremely hard on them.
"One particularly persistent battery myth is that you need to occasionally fully discharge and recharge to erase “battery memory.” This couldn’t be more wrong for lithium-ion batteries. It’s a leftover myth from lead-acid cells, and it’s pretty undesirable to charge your modern smartphone in this way"
Charging habits to maximize battery life

hand-filer said:
They're not experts. Lithium-ion batteries do not require recalibrating. Discharging to 0 is extremely hard on them.
"One particularly persistent battery myth is that you need to occasionally fully discharge and recharge to erase “battery memory.” This couldn’t be more wrong for lithium-ion batteries. It’s a leftover myth from lead-acid cells, and it’s pretty undesirable to charge your modern smartphone in this way"
Charging habits to maximize battery life
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thanks for setting me straight