I have tested my battery and have received some weird results, and these are consistent and happen with a reproduction rate of 100% (for me, at least)
If I let my screen stay on via Google Navigation with GPS, WiFi, Bluetooth and full brightness, I get about 2 hours and 20 minutes of continual screen-on time before the battery dies, from 100% 4200mv
If I delete /data/system/batterystats.bin once I get to 100% 4200mv battery, and do the exact same procedure as said above, I get 4 hours and 10 minutes of battery life (about double!)
Now afterwards I let the battery drain from step 2, and charge back to 100% (a supposedly calibrated battery), and do the same procedure, I got 2 hours and 10 minutes of screen-on time before the battery went dead.
I then again deleted batterystats.bin at 100% battery, unplugged and did the exact same procedure and it lasted again a little over 4 hours of screen-on time.
Why am I seeing such great battery life when batterystats.bin has been deleted, as opposed to when I supposedly have a newly calibrated batterystats.bin file?
Any ideas?
You might ask people in this thread:
http://forum.xda-developers.com/showthread.php?t=1423054
There are several knowledgeable users and developers who are discussing this kind of calibration stuffs (related to your issue).
Related
Hi all,
I know this issue has been kicked to death but I'd like to get some opinions. I've searched and read through numerous threads about the tp2's battery and some are extremely happy with their battery life while others are not.
Just today I was talking on my tp2 for 5 mins and the battery went from 98-99% to 91%. This was around hr after I had unplugged it from a 7hr recharge (went from 50% to 100%). This would mean I have a talk time of 50-60 minutes, which doesnt seem right.
Typically, I get down to 40-50% in a day after heavy data usage (google maps, internet browsing) with no phone usage.
I've installed maybe 10 tweak cabs/programs and I've made sure s2u2's display mode is set to rawbuffer.
Thoughts?
Is your battery/device new? The battery needs a couple recharge cycles to reach optimal capacity...
have had it for 4 weeks now. Are we talking about 0 to 100% when you talk about recharge cycles?
I wouldn't worry too much. I find that when the battery capacity is above 90%, the readings are not very accurate. I've sometimes experienced a drop of 6 or 7 percent over a span of a few minutes and sometimes, it's stuck on 99 or 98 percent for an hour of usage.
I use my device heavily during the day and it gets down to about 40% at the end. So, that's pretty much in line with what you experience.
I got a Naztech 3000 mAh "extended" battery, since my stock one lasts for around 14 hours on a single charge. I figured I may add an extra 6 hours or so, or use my phone a bit more during the day.
So, here's what happened.
Day one: 4 hours after I charged my "extended" battery, I was down to 15% charge. 1 hour later, it was at 1%. I hadn't used my phone AT ALL. Charged after 6 hours of (no) use.
Day 2: Pretty much the same.
Day 3: Ran Battery Repair and wiped battery stats. No change.
Day 4: Used my phone heavily, and noticed it stayed at 1% for a couple of hours.
Day 5: Noticed a pattern. The battery will drop to 1% within 3~4 hours of use, and will stay there for around 9 hours. Then it'll turn off.
So, the "extended" battery lasts for some 12 hours - tops. 3 hours after charging you won't know how much juice you have left, since it stays at 1% from that point on.
Bottom line: don't waste your money, the battery is crap.
I have the same issue but not with that battery, i've been trying to find a way to fix it, none of the battery voodoo has worked for me yet
after my phone shuts off because it thinks it's dead and i plug it in to charge, within 2 minutes i have about 20% or more charge in the battery, then after 15 minutes it's about 50% or more charge.
is that same thing happening to you ??
jodahall said:
I have the same issue but not with that battery, i've been trying to find a way to fix it, none of the battery voodoo has worked for me yet
after my phone shuts off because it thinks it's dead and i plug it in to charge, within 2 minutes i have about 20% or more charge in the battery, then after 15 minutes it's about 50% or more charge.
is that same thing happening to you ??
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Sort of, yes. It charges in half an hour, tops - if the phone is turned off. If I then turn it on, the phone shows 40% charge, or so - and tops 10 or 15 minutes later. Bizarre!
Happens to me also but only with the replacement battery i have.? It discharges fast and stays at 5% for a few hours. The OEM Battery 1880mah works fine about 1 and half day
Sent from my MB860 using XDA App
rapidmancy said:
Happens to me also but only with the replacement battery i have.? It discharges fast and stays at 5% for a few hours. The OEM Battery 1880mah works fine about 1 and half day
Sent from my MB860 using XDA App
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I am having the same issue with my OEM Battery.Is there any solution for this or can we set the indicator to show the charge according voltage of battery bcoz i have noticed that charge time is good only indicator is not showing it accurately .My phone last full charge lasted more than 17hrs but it was on 5% in 2 to 3hrs of use.
Update: Today my charge was at 100% at 10.00 AM. With light usage, the phone died at around 5.30 PM.
My battery seems to report better percentages of juice left if I use Kholk's kernel, but I'm not sure exactly why. It doesn't go along very well with Faux's kernel, though.
...can't say much about the factory kernel. Haven't used it much myself.
fjhuerta said:
I got a Naztech 3000 mAh "extended" battery, since my stock one lasts for around 14 hours on a single charge. I figured I may add an extra 6 hours or so, or use my phone a bit more during the day.
So, here's what happened.
Day one: 4 hours after I charged my "extended" battery, I was down to 15% charge. 1 hour later, it was at 1%. I hadn't used my phone AT ALL. Charged after 6 hours of (no) use.
Day 2: Pretty much the same.
Day 3: Ran Battery Repair and wiped battery stats. No change.
Day 4: Used my phone heavily, and noticed it stayed at 1% for a couple of hours.
Day 5: Noticed a pattern. The battery will drop to 1% within 3~4 hours of use, and will stay there for around 9 hours. Then it'll turn off.
So, the "extended" battery lasts for some 12 hours - tops. 3 hours after charging you won't know how much juice you have left, since it stays at 1% from that point on.
Bottom line: don't waste your money, the battery is crap.
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Actually, the atrix doesn't support aftermarket batteries. Motorola says so, and Mugen says so. That battery is fine, you can use it on 1% for a while. And when it dies charging from 1-99% is accurate for my battery. But when you hit 100% all bets are off.
---------- Post added at 08:15 AM ---------- Previous post was at 08:06 AM ----------
fjhuerta said:
Update: Today my charge was at 100% at 10.00 AM. With light usage, the phone died at around 5.30 PM.
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Did you turn phone off to charge, and pull battery and after it boots to a ?. You should let it sit there for a while and try again.
Mugen has an extended battery for the Atrix:
http://www.mugen-power-batteries.co...-for-motorola-atrix-4g-with-battery-door.html
Of course, that one is $119, so it probably will work as intended...
Yesterday I got 6 hours out of my charge. I got fed up and swapped the battery for the stock one. $25 I'll never see again...
Ok so after a hard reset and at 100% charge my HTC Radar says 1 day and 15 hours remaining. It has been like that for a few days. After about a week, 100% charge results in 20 hours remaining life. Eventually after a few more charges it averages at 15-17 hours remaining battery life. That is a big worrying decrease. These figures are always noted after a 100% charge and leaving it to settle for a bit.
So I started thinking what could be causing this decreasing stand by time?
Two theories:
1. It must be an app as I got excellent stand by time from a hard reset and with no additional apps so maybe a particular app is playing with the battery meter?
2. Could it be leaving the phone over night plugged in is doing something to the battery? Maybe I should unplug it as soon as it gets to 100%?
The strange thing is it can't be the actually battery degrading over time as the phone is new. Also, I have recently flashed a custom ROM to my Radar at a point when stand by time was at 15 hours at 100% and after the flashed ROM the standby time went back up to 1 day and 15 hours. Something is not right. It must be an app.
Any other thoughts/theories or anyone else in a similar situation?
Discuss please so we can all learn something to hopefully solve this problem for other handsets too!
My guess: calibration. The system estimates your runtime based on previous runtimes, that's why it's getting lower. Did your phone actually ever run that long, btw?
yes it did. very very close. i was amazed.
and does it now actually run out faster? I have noticed this on my ipod. It used to tell me 1h battery remaining and it would run for another 3h until i got home and another 2h the next day (when I noticed I forgot to charge). Also, are you using your phone more now? The biggest battery drain is the display.
Remaining battery life is estimated as follows:
Immediately after being removed from the charger is based on previous usage charging.
After this time estimate is based on current consumption.
In the first week after hard reset or install ROM the period are recorded in the system.
After a year of use of personal phone (HD7) and trying different rom and different settings for gps, 3g, edge, and light i found that the consumer eating large battery . After a more detailed study will say that is the main consumer.
Thanks for your comment Ovi but this is not about how the consumer is wasting the battery by usage. The question I raised was about how the standby time varied at 100% after a hard reset and after weeks of usage at 100%. The stand by time decreased without using the phone after a full charge. That is what is puzzling me. In theory it should be the same stand by time no matter how long the phone has been owned and the rate of discharge is due to usage - agreed.
I've been experiencing this issue for awhile now on multiple Roms after multiple charge cycle.
Battery drain is consistent and expected until around 30%. Then the battery drains to 0 in 90 minutes or less.
Anyone with similar issue or thoughts?
Do I need to replace my battery? I've been seeing this for probably 4-6 weeks.
Yeah, I have the same problem. I think it means that your battery is not calibrated properly.
It's either not calibrated properly (meaning charge it 100% and go into the boot menu->advanced->erase battery stats) to recablirate and or you have gone past the 100 charge cycles a battery phones stays optimal. Depending on use you may need it
I've never seen anything like this. My battery literally dropped 6 percent in a split second while I was looking at the %. Is this a manufacturer defect, would a factory reset do anything to help? Please Help.
WackyClash said:
I've never seen anything like this. My battery literally dropped 6 percent in a split second while I was looking at the %. Is this a manufacturer defect, would a factory reset do anything to help? Please Help.
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No, not necessarily. It takes time for a system to properly calibrate the battery. You should always give it a few full charge cycles before assuming you have a problem.
phonic said:
No, not necessarily. It takes time for a system to properly calibrate the battery. You should always give it a few full charge cycles before assuming you have a problem.
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This.
I wouldn't worry about it it likely hasn't calibrated yet, I've seen many of my devices do this, especially new or freshly wiped
Sent from my SGH-I747 using Tapatalk 2
You are overreacting. Large amount of power consumption in short time isn't unheard of. For example, it has been reported that phone searching for connections and syncing everything at once can cause large drops in battery meter. And battery meter isn't always accurate anyway.
If the battery drops more drastically and happens more than a couple of times, then I would worry.
My tablet does the same too it either goes from 78 to 76 or just skips from 30 to 26 randomly
The first day I got it, the battery went from ~50 to ~60. You read that right...it went up without charging. Just let the battery settle and it will become perfectly normal again.
Mine does the same, drop from 33% to 23% instantly. and while charging, it jumps from 94% to 100% too. But i do get 9:30 hrs use time with Chrome.
Still in the return period window, not sure to return it or not.
I think that the battery percentage sometimes freezes and doesnt update right. So once the software finally gets a good reading or update it will suddenly change alot. I had it stay at 85% for like 3 hours and was thinging, AWESOME this is amazing, then 15 minutes later it was at 50% and i was like, oh, damn it was just playing mind games with me.
The battery gauge doesn't really 'know' the charge state of the battery, it's just guessing more or less accurately based on a model of the battery.
It takes things like battery voltage, load, temperature, voltage change with varying load (to estimate internal resistance of the battery) to basically make an 'educated' guess of the charge state. There can be pretty big corrections of that guess - a 10% jump is very normal. It doesn't mean the battery charge state has changed, it just means the battery gauge has corrected it's estimate.
during charging, i seen that it increased 1% per every 4~6 mins from 1% to 94%, then it jumped to 100% from 94% in the next 6 mins.
It also skipped percentage 4~6 times while charging from 1% to 94%, 1% per skip.
I used Batterybot pro to monitor the battery, it will logs when the percentage has changed, that's how i know it was doing this.