This is why your battery drops 10-15% in the first 20 minutes.

[dfine1966]

I was having similar questions about charging and why power drops so quickly. I have noticed if I charge the phone in the off mode, and the green light goes on, I unplug it and shut it off for the night. When I turn it on in the morning, it is not 100%. It is usually anywhere's from 99% to 96%, never 100%. Now when I charge it off first and it hits green, I unplug the EVO, turn it on, plug the charger in and wait till it gets to 100% again, and then shut it off, and when I turn it off, it is 100%. This makes no sense to me at all. I was going to ask the question of which is the best way to charge the phone, ON or OFF? I have seen just the opposite effect with it being On vs Off. It seems to stay at 100% more being ON, not OFF. But it does seem to work better charging it from the off first(quicker) than turning it on to top it off. Is every EVO different, are the batteries (Stock) acting differently for everyone.

What is the best way to charge it and get 100% in the morning?

 

[Eazy123]

>B) Battery capacity indicator circuitry isn't reporting proper battery capacity


personally - i think this is the case - especially with the widgets. this is why i've ditched the battery widgets with %. hey are not correct and i don't need to stress over every misreported %. i use the stock default battery bar and am a lot less stressed about battery life now.

I know that my battery widget (which I paid $1 for) will be at, say 76%. I can literally watch it jump to 73%, for example. So I understand what you mean. I'm using Battery Time, btw.

But after a night of charging, I'm usually in the mid 90s by the time I get to work, so it's not that bad.

 

[bigblue4ever]

>B) Battery capacity indicator circuitry isn't reporting proper battery capacity


personally - i think this is the case - especially with the widgets. this is why i've ditched the battery widgets with %. hey are not correct and i don't need to stress over every misreported %. i use the stock default battery bar and am a lot less stressed about battery life now.

I've done the same..

 

[RayStinkle]

Yeah I don't know if I agree with this thread, cause the nexus one does in fact trickle charge. I would just assume the evo does as well. But who knows.

It also doesn't have that problem losing charge in the first 20 minutes.

 

[AngryCPA]

I usually top off the battery on the car charger on the way to work each morning and I have noticed a more consistent drain throughout the day after doing this.

 

[debsawyer]

This happens to me a lot. I fully charge my phone and unplug it and 10 minutes later at least 30% of the battery is gone. I actually seen the battery meter just drop. The Pre was not this bad.

 

[UTnick]

for the past few days i have been charging my phone while on to use the alarm clock and then when i wake up i turn it off and leave it to charge some more. today when it powered on i was astounded to see the battery still indicate a 100% charge even though i powered it on after i took it off the charger. shocked.

 

[ihbsbA]

I cannot disagree with you more.

I charged it to 100%, watching the LED go from orange to green, and took it off the charger. Dropped 6% in the first few minutes and I was just watching it, not doing anything remotely power consuming on the phone. It dropped to 88% after 10 minutes total. Its not due to anything running in the background because I do not run any task killers and did not reboot the phone and continued to use it for an additional 43 hours... (I can provide screenshot of my JuicePlotter if you would like) from late Friday night to late Sunday night.

When I went to bed last night it was at 47% and woke up 6 hours later it was at 44%. My phone is currently at 26 hours without being charged and at 34%. In comparison my friend has Good For Enterprise (GFE) which constantly keeps his phone awake and he can't make it half a day without having to charge it.

Some of the characteristics I am noticing with this phone that are abnormal. Usually when charging a battery and it approaches maximum capacity, charging will slow down, each % becomes longer and longer. With the EVO it seems to be very linear, no slow down. Example of normal charging: charging from 80% to 90% takes less time than going from 90% to 100%. Charged my phone to 100% (green LED) and used it to take the battery level to 90%. Put it back on the charger and it quickly reached 100% (green LED) in maybe 10 minutes.

It seems as if:
A) Battery charging circuitry isn't charging the battery to full capacity
B) Battery capacity indicator circuitry isn't reporting proper battery capacity

You can post screenshots all day long, but until we see how you're using the device, we can't possibly know/believe this usage- I simply do not believe anyone can get 43 hours out of this phone unless it's OFF.

 

[xorbe]

Sorry, but I leave mine plugged into the wall charger all night with the phone on. I don't see a drop when I yank it off the charger in the morning. What is the battery voltage before you yank it off the charger?

 

[whippingboy]

You can post screenshots all day long, but until we see how you're using the device, we can't possibly know/believe this usage- I simply do not believe anyone can get 43 hours out of this phone unless it's OFF.

No widgets, no live backgrounds, no notifications/alerts, no social networking enabled- sync email ONLY when you access the mailbox, turn off vibration completely, run in completely silent mode (no ringers no chimes.)

IF you do all that, I'm sure you can get at least 24+ hours of casual use...but 43 HOURS? Wow. I haven't done that since my Nokia dumbphone days.

 

[Gekko]

for the past few days i have been charging my phone while on to use the alarm clock and then when i wake up i turn it off and leave it to charge some more. today when it powered on i was astounded to see the battery still indicate a 100% charge even though i powered it on after i took it off the charger. shocked.

what?

 

[anon(26928)]

Ok, I don't want to derail this topic as it was talking about the initial battery drop of 10-15% shortly after being taken off the charger but I will answer these.

I do use widgets, but only for the LED Flash, Screen Brightness, 4G, Airplane Mode, Wi-Fi, Clock and Weather. I do not use live backgrounds. I do use notification alerts. I do use social networking but only in the form of instant messaging, texting, fring. My mailbox syncs real time through gmail. I have hepatic touch enabled for all touches on the phone. Phone set to vibrate when at work, sound when at home.

1 day = 24 hours
4 days = 96 hours

I stated 43 hours.

I am not a power user but I frequently browse on the Internet, play youtube clips, gmail, game in my down time, text, IM, play pandora to and from work as well as going for lunch, use the market, use spare parts / juiceplotter to check out my usage and find out where the phone is consuming it the battery.

Time since last plugged in 1d9h47m
Time screen on since last plugged in 2h46m
Time spent awake since last plugged in 4h34m

 

[xorbe]

The instant messaging clients do not let the phone sleep. Well, I haven't found one that does, yet. 5 hours if I have an IM client active.

What IM client do you use?!

Where did you find the "Time spent awake since last plugged in" statistic?

 

[Mom2Ninjas]

Plain and simple: When the Evo is fully charged, it begins running off its battery until you plug it back in. It DOES NOT trickle charge whatsoever after it reaches 100%. When you're using your Evo on the charger, and it's showing full 100% charge, it is running off the battery, not the AC plug. And then when you unplug it, well, we all know what happens next. The battery meter drops insanely fast to the actual charge of the battery, which could be very low, depending on how long it's been sitting idle at 100% on your charger.

So all those times you've charged your Evo overnight, only to take it to work the next day and be at 80% within an hour? Your Evo was running off its battery for what I'm guessing was most of the night. It takes my Evo about an hour to two hours to fully charge back to 100%. Let's say you put your Evo on the charger at 11PM, it'll reach full charge by 1AM at the latest, and then run off its battery until whenever you take it off the charger in the morning.

Workarounds?

1) Turn your Evo off while it's charging.
2) If you must leave it on for an alarm clock, put it in airplane mode and end all CPU intensive tasks to minimize battery drain.
3) When you wake up, unplug it for 10-20 minutes (still experimenting with this number), and then plug it back in to top it off. Once it reaches 100%, take it off the charger, and go about your day.

Try it out for yourself. When your Evo is 100% charged, take it off the charger immediately, and I highly doubt you will lose the 10%-15% within minutes. Please share your findings.

This is insanely interesting and I will definitely try it tonight... I seem to always have my big drops on the battery first thing in the morning. Nothing lost for giving this a shot.

 

[anon(26928)]

I use Talk and Fring.

To see the usage since last plugged in and other information use Spare Parts. Very valuable when trying to track down programs that are using cpu and other time on the phone.

 

[Mom2Ninjas]

No widgets, no live backgrounds, no notifications/alerts, no social networking enabled- sync email ONLY when you access the mailbox, turn off vibration completely, run in completely silent mode (no ringers no chimes.)

IF you do all that, I'm sure you can get at least 24+ hours of casual use...but 43 HOURS? Wow. I haven't done that since my Nokia dumbphone days.

What is the point of anyone having this phone if they run it like that? LOL, It is a power phone we have to just do the best we can with what we have.

 

[stolirocks]

Plain and simple: When the Evo is fully charged, it begins running off its battery until you plug it back in. It DOES NOT trickle charge whatsoever after it reaches 100%. When you're using your Evo on the charger, and it's showing full 100% charge, it is running off the battery, not the AC plug. And then when you unplug it, well, we all know what happens next. The battery meter drops insanely fast to the actual charge of the battery, which could be very low, depending on how long it's been sitting idle at 100% on your charger.

So all those times you've charged your Evo overnight, only to take it to work the next day and be at 80% within an hour? Your Evo was running off its battery for what I'm guessing was most of the night. It takes my Evo about an hour to two hours to fully charge back to 100%. Let's say you put your Evo on the charger at 11PM, it'll reach full charge by 1AM at the latest, and then run off its battery until whenever you take it off the charger in the morning.

Workarounds?

1) Turn your Evo off while it's charging.
2) If you must leave it on for an alarm clock, put it in airplane mode and end all CPU intensive tasks to minimize battery drain.
3) When you wake up, unplug it for 10-20 minutes (still experimenting with this number), and then plug it back in to top it off. Once it reaches 100%, take it off the charger, and go about your day.

Try it out for yourself. When your Evo is 100% charged, take it off the charger immediately, and I highly doubt you will lose the 10%-15% within minutes. Please share your findings.

You are absolutely wrong. I have been plugging mine in each night and it is on all night while plugged in and it is fine the following day. I get awesome battery life.

 

[Richard_Danger]

I have had this same issue where my battery would drain 10-15% quickly. I had thought that it was due to the phone being idle for so long that it used up a lot of juice to start itself back up again. Your explanation is much better.

My solution was to, after having it on the charger all night, wake the phone up and send a couple text messages, check twitter, then unplug it. This slowed the battery drainage quite a bit. So after an hour, instead of being at 88%, I am still around 93%.

Other than this, my battery drainage hasn't been a problem, but then again I am not a "power user".

 

[Kedar]

Yeah I just use the stock battery indicator. I stress less about my usage.

 

[ihbsbA]

What is the point of anyone having this phone if they run it like that? LOL, It is a power phone we have to just do the best we can with what we have.

AMEN.

Sent from my rockin' Evo.