Database Users

Battery Power Drops from 100% to 90% in about 3 mins?

Has anyone else seen this? From 100 to 90% the power just drops almost instantaneously but after 90% its normal.

Already been brought up, a lot.
Apparently when your phone charges up it stops once it reaches ~100% and begins discharging, even though it is still on the charger. People will turn their phone off after a full charge and charge for an additional 20min to an hour before they get another green LED. People have reported much longer battery life when doing this, but it is a pain in the ass.

Studmf said:
Already been brought up, a lot.
Apparently when your phone charges up it stops once it reaches ~100% and begins discharging, even though it is still on the charger. People will turn their phone off after a full charge and charge for an additional 20min to an hour before they get another green LED. People have reported much longer battery life when doing this, but it is a pain in the ass.
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Ahh interesting. I thought I was running into an old winmo rom flashing issue where if you flashed under 50% battery life you could never charge the device above that point.

Yea it sucks but it works... I just ordered an external battery charger since I have 2 batteries now so I don't have to do this anymore
Sent from my ADR6300 using XDA App

two_cents said:
Yea it sucks but it works... I just ordered an external battery charger since I have 2 batteries now so I don't have to do this anymore
Sent from my ADR6300 using XDA App
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Hmm i tried and it acted the same way.

Apparently the HTC models act like older phones did back in the day. What HTC needs to do is put something on the phone face itself when new that says "CHARGE FOR 4 HOURS BEFORE INITIAL POWER ON FOR MAXIMUM BATTERY LIFE."
Once you do this once you dont have to keep doing it. I also powered on my phone the minute I got it and activated it without charging it first and I was seeing this issue until I did a power off charge. The phone runs from 6am to 11pm without an additional charge cycle in the day and that is a huge improvement for me. I was charging the phone twice to three times daily.

Battery overcharge ?

What happens if I leave my battery charging over night and I don't unplug the charger once my phone pops up the message telling me to do so. Will my battery overcharge and fail? Or its out safe to leave it plugged on once charging is done?
Sent from my SGH-T959 using XDA App

mystycs said:
What happens if I leave my battery charging over night and I don't unplug the charger once my phone pops up the message telling me to do so. Will my battery overcharge and fail? Or its out safe to leave it plugged on once charging is done?
Sent from my SGH-T959 using XDA App
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Your phone will be fine, there are fail safes in place to prevent over charge (and fire/explosion). Its just a "convenient" notification to let you know the phone is done charging.
On a separate but related issue, I don't suggest leaving it charge more than 10 hours at a time, since the battery keeps topping off the charge, and in my experience this degrades batteries a bit faster.
Sent from my SGH-T959 using XDA App

Your battery will be fine. Just don't do it every night and you will be good.

Aphotix said:
Your phone will be fine, there are fail safes in place to prevent over charge (and fire/explosion). Its just a "convenient" notification to let you know the phone is done charging.
On a separate but related issue, I don't suggest leaving it charge more than 10 hours at a time, since the battery keeps topping off the charge, and in my experience this degrades batteries a bit faster.
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this.
Constant topping up will shorten the battery life. Not something to be annal about but don't do it too often. It also does not mean you have to fully drain your battery before charging, nor that you have to set an alarm so you take it off charge as soon as it read full.

Wait, so I should not charge my phone en route from work to home? About a 30 minute drive... not enough to fully charge the phone, just enough so it doesn't die before I go to bed.
I thought batteries did not have "memory" and that you could charge them however.... is there a good source to read?

Constant topping up will shorten battery life?
Care to back up that statement with some sources?
Heat kills Lithium based batteries.
A quick rate of charge or discharge creates heat.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
(From the article)
The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible.
should be balanced with this (from the article as well)
batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem.
My recommendation is to keep the battery as full as possible at all times and do a full calibration cycle once a month. Done.
If you want the battery to last longer stretch the calibration to once every two months... However the phone will be obsolete before noticeable shortening of the battery life from doing 30 day calibrations. PLUS THE BATTERY IS REPLACEABLE ANYWAY. So, honestly, who cares?

mystycs said:
What happens if I leave my battery charging over night and I don't unplug the charger once my phone pops up the message telling me to do so. Will my battery overcharge and fail? Or its out safe to leave it plugged on once charging is done?
Sent from my SGH-T959 using XDA App
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If your battery overcharges and fails, your battery is a danger to you and everyone around you anyway; no matter what charging methods you use. A properly working lithium ion battery cannot be overcharged.
I suggest reading up on how float charging works.

I plugged the phone and go to bed everynight

Emama said:
I plugged the phone and go to bed everynight
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This is normally what I do, so it charges 5-7 hours a day, I don't normally kill it during the day, but it does get pretty low

novafluxx said:
This is normally what I do, so it charges 5-7 hours a day, I don't normally kill it during the day, but it does get pretty low
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So u mean plugged in overnight may kill the battery faster?

Emama said:
So u mean plugged in overnight may kill the battery faster?
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of course. if you always do it.
Sent from my SGH-T959 using XDA App

My phone is samsung j7 prime ....
Yesterday i charge the divise over night ...
Does it will effect my battery?

Is anyone else getting...

battery charged message at 95 or 97%?
defective battery?

Yeah me too. The only way I can get the battery to 100% is by using my spare battery charger. Trying to charge it in the phone always results in it maxxing out at like 96.
Sent from my SPH-D700 using Tapatalk

Yep..same here. I get it to charge to 100 by taking it off the charger for just a sec then putting it back on.
Sent from my SPH-D700 using XDA App

same. Usually 97%

Picked up a new charger, and it goes to 100% and beyond, and the LED light never turns blue!!!
Seems to charge faster, that extra .5A must be helping!

I mostly charge my phone when it's off and I always get 100%

Have you let your phone completely die yet. I had the same issue and really bad battery life (like 5 hours max). It helps to let the battery completely die every few days. Before I let it die the best I got was 97%. Now I get 100% all the time. Also my battery last closer to 10-12 hours, depending on use.
Sent from my SPH-D700 using XDA App

Yes, mine stopped at 95. I tried charging, turn off phone, put on charger for an hour, then turn on, got to 97. Traded batteries the same.
However, one reading says 100, one says 97 - the batteries have issues is all I can figure out. Might be internal software.

Normal for lithium-ion batteries and modern chargers.

helchez said:
Have you let your phone completely die yet. I had the same issue and really bad battery life (like 5 hours max). It helps to let the battery completely die every few days. Before I let it die the best I got was 97%. Now I get 100% all the time. Also my battery last closer to 10-12 hours, depending on use.
Sent from my SPH-D700 using XDA App
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a few times yes should i let it again?

badasscat said:
Normal for lithium-ion batteries and modern chargers.
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so htc hero and palm pixi arent modern? cuz they dont have this problem

6 hours to recharge?

I recharged my Galaxy Tab 10.1 yesterday from a 15% remaining charge.
I powered it off and used the wall charger. It took almost 6 hours to charge to 100%!
Is this normal or is there something wrong with the battery?
Thanks!

Mine was slow at first too. But now seems to have gotten quicker.

luigig said:
I recharged my Galaxy Tab 10.1 yesterday from a 15% remaining charge.
I powered it off and used the wall charger. It took almost 6 hours to charge to 100%!
Is this normal or is there something wrong with the battery?
Thanks!
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What is the rating on the charger that comes with the unit?

The rating is 5V - 2A

Yep, noticed it took about 3 hrs to go 40% charging. Not sure why there is such a drastic difference from the Xoom which could charge from 10% to full in little over an hour with similar drain to GT.
Sent from my PC36100 using XDA Premium App

Ravynmagi said:
Mine was slow at first too. But now seems to have gotten quicker.
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Can you please quantify what quicker means?

We have a rather large battery in the device, while I agree 6 hours is abit much, it should be quicker at 2 amps.
On the other hand, I sit in on the charger at night before I go to bed. I am definately a heavy user as well, and the battery lasts me all day with atleast 30 to 40% left over by bed time (this includes a 1.5 hour commute each direction using Waze, the GPS, and wifi tethered to my phone, 2 gmail accounts polling every 15 min, web surfing throughout the day, and playing games during my morning and afternoon constitutions .. I know.. too much info)..
So I can live with a longer charge time, at least for now..

I charged my GT Tab completely before using it the first time. Then I drained it down to about 9%. I timed my first full charge from 9% to 100%, it took exactly 6 hours and 4 min. My Xoom charged in half the time. I am hoping it gets better like I have heard from different people.

dsEVOlve said:
Yep, noticed it took about 3 hrs to go 40% charging. Not sure why there is such a drastic difference from the Xoom which could charge from 10% to full in little over an hour with similar drain to GT.
Sent from my PC36100 using XDA Premium App
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i believe the xoom's charger is 16watts or more. i can't really remember, but it's got the highest rated charger b/t the xoom, tf, and gt10.1.

I think that's just wishful thinking on their part. How does a battery suddenly learn to charge itself faster. You make it sound like the battery is a muscle you can work out. The thing takes forever to charge but it also has excellent battery life. So as long as you don't find yourself in a hurry to travel without time to charge the battery should last you almost all day.
Sent from my PC36100 using XDA Premium App

I charged the device fully before use. Used it down to 10%, plugged it in and charged to full powered off. This took around 6 hours. The second time I charged it from around 14-15% It took about 4 hours. I have charged it twice more since from almost zero, and it's taking about two hours.

Remember the math:
7000 mAh battery
2000 mAh charger
That means from drain to full if the screen is off, about 3-4 hours. If you have the screen or device on and it's doing anything, it's using some of that incoming charge, so will increase to 4, 5, 6 or more hours to fully charge.
Gets even worse if using an aftermarket charger, say a 800 mah or 1000 mah charger like the iPhone or Kindle charger...can then take 10-14 hours to fully charge, hehe.
It's funny how people say it charges quicker after a while, when that's not logical, you just don't notice it as much going from 65% to 100% as you noticed when it went from 15% to 100% the first time, hehe

tycon said:
I charged the device fully before use. Used it down to 10%, plugged it in and charged to full powered off. This took around 6 hours. The second time I charged it from around 14-15% It took about 4 hours. I have charged it twice more since from almost zero, and it's taking about two hours.
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The xoom charges super fast, like from almost zero to full in around 2 hours. That's about all i miss right now
Sent from my PC36100 using XDA Premium App

jvs60 said:
The xoom charges super fast, like from almost zero to full in around 2 hours. That's about all i miss right now
Sent from my PC36100 using XDA Premium App
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Smaller battery=shorter charge, a 2 gallon gas tank is quick to charge too, hehe.... kidding.
But seriously, Samsung is bad with their charging. My Samsung Infuse and my Galaxy tab both take forever to charge.

tycon said:
I charged the device fully before use. Used it down to 10%, plugged it in and charged to full powered off. This took around 6 hours. The second time I charged it from around 14-15% It took about 4 hours. I have charged it twice more since from almost zero, and it's taking about two hours.
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Did I read it correctly that if recharged from almost 0 (e.g. <5%?), it takes only 2 hours to go to 100%? This seems counter intuitive.

luigig said:
Did I read it correctly that if recharged from almost 0 (e.g. <5%?), it takes only 2 hours to go to 100%? This seems counter intuitive.
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I think someone has a bad battery

verusevo said:
I think that's just wishful thinking on their part. How does a battery suddenly learn to charge itself faster. You make it sound like the battery is a muscle you can work out. The thing takes forever to charge but it also has excellent battery life. So as long as you don't find yourself in a hurry to travel without time to charge the battery should last you almost all day.
Sent from my PC36100 using XDA Premium App
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i think what happens is that as the battery calibration gets more accurate it finds where to quick charge and where to trickle in the appropriate levels.

[Q] Is my battery normal?

Yesterday when I woke up my G2 has 20% battery left, then I charge it to 80%. Then in the evening I charge it again 40%-80%. Then today I woke up again, (In the first SS)I'm just curious why is my "Usage in Battery" reaches 46 hours 29 minutes? It combines the usage on the other day and yesterday. "Expected time to use" is 61 hours, but I know it is not accurate because when I started playing games for like 10mins it goes down to 1hour left haha. And in the second SS, I'm assuming that it also combines the Screen time of the other day and yesterday.
a 20%-80%=60%
b 40%-80%=40%
c a + b = 100% I think it is 1 full cycle and should turn my battery Usage to 0 min again.
Is this normal? I don't really understand how G2's battery works.
I usually charge my G2 two times a day because of games. And charges it when it reaches below 40% to 80%. I don't really drain it and charge it to 100%. Am I doing it right?

coowkeee said:
Yesterday when I woke up my G2 has 20% battery left, then I charge it to 80%. Then in the evening I charge it again 40%-80%. Then today I woke up again, (In the first SS)I'm just curious why is my "Usage in Battery" reaches 46 hours 29 minutes? It combines the usage on the other day and yesterday. "Expected time to use" is 61 hours, but I know it is not accurate because when I started playing games for like 10mins it goes down to 1hour left haha. And in the second SS, I'm assuming that it also combines the Screen time of the other day and yesterday.
a 20%-80%=60%
b 40%-80%=40%
c a + b = 100% I think it is 1 full cycle and should turn my battery Usage to 0 min again.
Is this normal? I don't really understand how G2's battery works.
I usually charge my G2 two times a day because of games. And charges it when it reaches below 40% to 80%. I don't really drain it and charge it to 100%. Am I doing it right?
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I think it is better to charge it 100%.
But if the battery dies you can always replace it

I'm a person who tries to not to do what you do because it could over time damage the battery. I always charge to 100% and try to drain it as much as I can before I recharge it.
Sent from my LG-VS980 using xda app-developers app

clapper66 said:
I'm a person who tries to not to do what you do because it could over time damage the battery. I always charge to 100% and try to drain it as much as I can before I recharge it.
Sent from my LG-VS980 using xda app-developers app
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And you'll damage your battery faster. Your approach was good for nickel based batteries, not good for lithium-ion.
This is the first link from Google search, there are many posts about it:
http://gizmodo.com/how-to-take-care-of-your-smartphone-battery-the-right-w-513217256

only if you charge it to 100%, then the statistic will starts a new one,
if you're charging up to 80% and disconnect the charger, the statistic will keep from the previous full battery charge statistic.

zekurosu said:
only if you charge it to 100%, then the statistic will starts a new one,
if you're charging up to 80% and disconnect the charger, the statistic will keep from the previous full battery charge statistic.
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Then people who always post their SS of the usage on battery of their phone that are hitting 2-3 days are all just being boastful? haha
That's why I'm always curious about my battery info because it is not always accurate and people tend to believe that their "usage on battery" info are always correct. I'm not saying all, but there are so many.
@chaki- do you know where I can find a replacement battery on my G2? Then if yes I will probably destroy my phone for charging 100% all the time.
@clapper66 , as @ddavtian said, it is for nickel based batteries only and you should change the way you charge your G2.

coowkeee said:
Then people who always post their SS of the usage on battery of their phone that are hitting 2-3 days are all just being boastful? haha
That's why I'm always curious about my battery info because it is not always accurate and people tend to believe that their "usage on battery" info are always correct. I'm not saying all, but there are so many.
@chaki- do you know where I can find a replacement battery on my G2? Then if yes I will probably destroy my phone for charging 100% all the time.
@clapper66 , as @ddavtian said, it is for nickel based batteries only and you should change the way you charge your G2.
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so its bad to kill a battery down to 10% then re charge to 100%?

clapper66 said:
so its bad to kill a battery down to 10% then re charge to 100%?
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I have been using my phones always the same way when it comes to charging.
Have never had issues with the batterys.
My sensation xl is more then 2 years old and still can standby more then 36hr wifi etc. on with the original battery.
What destroying are you talking about?
Thats the same if you don't drive your car, not to change your car battery......
At the end i bought that phone to use it, not other way arround.
One battery doesn't cost the world. There are service shops that can change it.

That link is a good read. Gonna try it from now on as this beast of a phone needs proper care as well :what:
Sent from my LG-D802