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?
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
+ 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
Related
Is it better for your battery's health for the battery to be kept topped off or is it better to let in drain to 15% or so before your charge fully??
Thanks
Use it but don't drain completely is the advice for modern battery's .
jje
I've always been curious about this to, From what I gather, like jje said just don't let it go too far down. I have read also that if you aren't going to use it for a prolonged period, don't leave it at 100 percent. Not sure I believe it, but I guess it has something to do with heat build up when it's maxed out on the charge. I use mine almost daily so I try to run it to about 20 percent and charge completely. Have had it since launch, 6 months now and have had no drop off in battery performance.
jaydubbbbs said:
I've always been curious about this to, From what I gather, like jje said just don't let it go too far down. I have read also that if you aren't going to use it for a prolonged period, don't leave it at 100 percent. Not sure I believe it, but I guess it has something to do with heat build up when it's maxed out on the charge. I use mine almost daily so I try to run it to about 20 percent and charge completely. Have had it since launch, 6 months now and have had no drop off in battery performance.
Click to expand...
Click to collapse
It's all about how the lithium works. It's very different than a NiMH or NiCD battery. Never let a Lithium battery stay at less than 5% for long or you may never be able to charge it again. Letting it stay at 100% for a long period of inactivity isn't really a bad thing because it will actually drain itself. A lithium battery uses a microprocessor to keep track of its cell life and charging levels, so that is always running and using a bit of its juice. The best practice for a lithium battery is to just keep it charged and keep using it. Letting it sit idle for like a month or two is not very good on the kind that are in cell phones and tablets.
http://batteryuniversity.com/ - an excellent resource and a good read in general
Edit: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries <- this article
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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):
Click to expand...
Click to collapse
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
Recently changed my battery for no real reason but the fact that I had another fully charged and couldn't be bothered plugging phone in.
So off for the rest of the day I went, noticed instantly that battery was lasting longer. At 60 percent I had exactly 2 hours screen on and by the end I had gotten well over 4 hours. My old battery used to get that but after update to 4.3 I was getting less (approximately 3 hours). Getting less battery time after the update was normal to me as not many people know that from 4.2.2 to 4.3 samsung removed the brightness reduction profile used in specific apps like chrome/browser to conserve battery (80% of full brightness setting). This was done to get battery life points at release date.
On top of that I noticed the phone was cooler and more faster, this however was not major just a more stable sense of feel.
Now the point of this post is to find out why, now I know there are issues with batches of battery's but unsure of its implication.
Another possible theory is faulty battery causing higher heat output and power loss which could also have at times caused throttling of phones performance to prevent damage (which we all know it does, quick example is using phone heavily while charging)
What you people think
Battery Very HOT!
I am pissed at Samsung. My phone nearly burned a hole in my pocket and lost its juice inless then 30 minutes when it approached 30% battery. I went to the battey tab and took a screenshot of its discharging curve! No surprise! The battery was hot and lost nearly all of its power in less than 15 minutes. I have yet to take it to Samsung to get a new battery before it catches fire!
Any recommendation on how to prevent that from happenening?
Michael Ceitlin
SG4-I9505 4.3
MCEITLIN said:
I am pissed at Samsung. My phone nearly burned a hole in my pocket and lost its juice inless then 30 minutes when it approached 30% battery. I went to the battey tab and took a screenshot of its discharging curve! No surprise! The battery was hot and lost nearly all of its power in less than 15 minutes. I have yet to take it to Samsung to get a new battery before it catches fire!
Any recommendation on how to prevent that from happenening?
Michael Ceitlin
SG4-I9505 4.3
Click to expand...
Click to collapse
Buy a other battery, you can get one cheap on ebay (Don't buy one that is really cheap, they are mostly ****ed up) :highfive:
MCEITLIN said:
I am pissed at Samsung. My phone nearly burned a hole in my pocket and lost its juice inless then 30 minutes when it approached 30% battery. I went to the battey tab and took a screenshot of its discharging curve! No surprise! The battery was hot and lost nearly all of its power in less than 15 minutes. I have yet to take it to Samsung to get a new battery before it catches fire!
Any recommendation on how to prevent that from happenening?
Michael Ceitlin
SG4-I9505 4.3
Click to expand...
Click to collapse
That isn't the battery's fault; there is something on the phone that is using up 100% CPU (explaining the heat and rapid battery drain).
yuuuuuuuu said:
That isn't the battery's fault; there is something on the phone that is using up 100% CPU (explaining the heat and rapid battery drain).
Click to expand...
Click to collapse
Agreed. Although, the battery could be the start. My phone gets extremely hot. I check the CPU usage and it's being occupied no matter how many times I clear the RAM.
If I'd be you, I would start from the battery callback... I would look if my battery is not swollen, if its serial is starting with BD...
but, it is me. I have a strange behaviour to start from looking if similar problem occurred for someone here in the past...
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:
Click to expand...
Click to collapse
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%.
Click to expand...
Click to collapse
Do you have a source for that?
poldie said:
Do you have a source for that?
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
How many charge/discharge cycles should I expect to get from my S6?
I got the phone in April, and since then I have used it for both business and private use.
I charge it overnight wirelessly, take it to work fully charged, then discharge and recharge it twice whilst at work (using the Samsung charger that came with it), then put it on charge for a 3rd time when I get home ready for the next day.
Fast forward 9 months and already I am seeing reduced battery life... Is this to be expected from 3 charge/discharge cycles per day, 6 days a week?
I've never seen this as a problem until now, as all my phones have either had removable batteries, or were only on 12 month contracts and were replaced before the battery became too worn.
Is it worth trying to get a battery replacement under the 12 month warranty before it runs out?
Big_Rich_1983 said:
Fast forward 9 months and already I am seeing reduced battery life...
Click to expand...
Click to collapse
please clarify what you mean by "reduced battery life". Any phone will suffer reduced battery life to some degree after 9 months.
How low do you let the battery go before charging? Some say it's not good to constantly recharge when the battery is not low (above 50%)? Others say that doesn't apply to newer phones with better battery tech. I don't know.
HKSpeed said:
please clarify what you mean by "reduced battery life". Any phone will suffer reduced battery life to some degree after 9 months.
How low do you let the battery go before charging? Some say it's not good to constantly recharge when the battery is not low (above 50%)? Others say that doesn't apply to newer phones with better battery tech. I don't know.
Click to expand...
Click to collapse
I generally run it down to 15% when the battery warning comes on... Very rarely to 5% when the critical warning comes on.
When I take it off charge, after about half an hour of screen time, it's down to 80-85 already, then I can get about another 2 hours of heavy use and constant screen time before it's dead again.
Big_Rich_1983 said:
How many charge/discharge cycles should I expect to get from my S6?
I got the phone in April, and since then I have used it for both business and private use.
Click to expand...
Click to collapse
Read somewhere reliable some time back that it's somewhere between 500-600 cycles before you see any degradation.. And I think there's something in the warranty which covers reduced battery life within 1st year provided you can prove it which basically means very rare!