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HTC EVO Battery issue

VSpike915

VSpike915

Member
Today on my EVO I only got about 8hrs of battery. Everything was off and the backlight was basically off. I did the guide that mr.virginia posted but haven't been able to retry since I had to let my ZAGG set. Does a hard reset fix this? Any help is much appreciated!
 
im new here, i am currently performing the hard reset and the multiple charge boot up as well as the *#*#4636#*#* to see if it helps... this morning at 7:30 i had 100% charge and by 12:35 i had 49% with little usage (not even high moderate)

im hoping this at least gets me 8 hrs of good moderate usage... well see
 
Since I don't have the phone rooted, can't have a display of this, but my last batt was at 2 bars when I swapped it. Here's the stats:

uptime was 82 hours and 45 mins.
awake time was about 1.5 hours.

And that's honest, no reason to lie. I'm not using the phone a lot, admittedly, but I am using it!

Put it into airplane mode at night.

It's not the battery, it's how much you are using it...

Chaco, go to settings, about phone, battery. You'll see more of the specifics that can tell you what's using the battery...
 
Chaco said:
im new here, i am currently performing the hard reset and the multiple charge boot up as well as the *#*#4636#*#* to see if it helps... this morning at 7:30 i had 100% charge and by 12:35 i had 49% with little usage (not even high moderate)

im hoping this at least gets me 8 hrs of good moderate usage... well see
Click to expand...

Agreed, I'm not really expecting the day plus that some get, as I'm a heavy user. Please update me after you finish all that because I thought about the multiple charge thing too!!!!
 
AsItLies said:
Since I don't have the phone rooted, can't have a display of this, but my last batt was at 2 bars when I swapped it. Here's the stats:

uptime was 82 hours and 45 mins.
awake time was about 1.5 hours.

And that's honest, no reason to lie. I'm not using the phone a lot, admittedly, but I am using it!

Put it into airplane mode at night.

It's not the battery, it's how much you are using it...

Chaco, go to settings, about phone, battery. You'll see more of the specifics that can tell you what's using the battery...
Click to expand...

It's all android system. Admittedly, I use mine alot since it's my first android and I love playing with it. And if you don't mind the stupid question, what does airplane mode do?
 
I had horrible battery life out of the box like everyone. Once I did the *#*#4636#*#* trick a charge would last me the day. Around 15-17 hrs. This morning I rebooted my phone fresh off the charger and forgot to change my radio and my battery was at 10% in 7 hrs.
 
smokin3000gt said:
I had horrible battery life out of the box like everyone. Once I did the *#*#4636#*#* trick a charge would last me the day. Around 15-17 hrs. This morning I rebooted my phone fresh off the charger and forgot to change my radio and my battery was at 10% in 7 hrs.
Click to expand...

I never had that problem. It always was CDMA auto-PRL for me. Strange.....Gonna try a hard reset later and update you. Stay tuned!
 
VSpike915 said:
I never had that problem. It always was CDMA auto-PRL for me. Strange.....Gonna try a hard reset later and update you. Stay tuned!
Click to expand...

It says CDMA auto-PRL for everyone. You have to hit the 'menu' button then click 'select radio'. OK the force close that comes. Then you will see that it is really GSR. Change it back to CDMA auto-PRL and then the exit with the back arrow or home key.
 
smokin3000gt said:
It says CDMA auto-PRL for everyone. You have to hit the 'menu' button then click 'select radio'. OK the force close that comes. Then you will see that it is really GSR. Change it back to CDMA auto-PRL and then the exit with the back arrow or home key.
Click to expand...

UPDATE: I did exactly what he said and I turned my EVO on at 11 this morning. I went golfing and besides one quick phone call and a few txt messages, it was in my pocket with the screen off. All radio's were off and I used Mr.Virginia's guide to get "38hrs on a single charge"
It is now 8:20 and has been on 10:20:14 with 40% remaining. GENIUS!! I'd assume heavier usage would get less battery, but I'm still tempted to hard reset it as people who have hard reset it after the update get much better battery life without doing the CDMA trick. (Might fix that as well?)
 
Everytime I go in there and do the prl change when I go back in it says CDMA until I hit the select band from the menu and its always back to GSM no matter what I do.
 
smokin3000gt said:
It says CDMA auto-PRL for everyone. You have to hit the 'menu' button then click 'select radio'. OK the force close that comes. Then you will see that it is really GSM. Change it back to CDMA auto-PRL and then the exit with the back arrow or home key.
Click to expand...

I'm not sure it isn't the force close that's causing it to be set wrong. I did this to my phone a long time ago, and it retains the Auto CDMA through reboots. But if I cause it to do another Force Close it goes back to GSM. If you never do the force close, I think it correctly reads CDMA. I noticed no change in battery life when I did this the first time.
 
Further Update:
After following the guide and doing the CDMA trick (I DO NOT have to do it every time I re-boot the phone FYI) and I easily get 12hrs a day on a charge with LIGHT usage. This means a few txt messages, one or 2 phone calls, check facebook real quick and then sleep it in my pocket. If I'm playing around with my home screens or cruising the Market browsing, I roughly get 9-10hrs. Another tip, if you're at home or a wi-fi area (assuming it's a decent signal strength) turn WI-FI ON and mobile network OFF. This uses wi-fi for browsing and the network for basics like txt messages and phone calls.
 
God god, the CDMA trick is bullshit. Even if it was searching for a "GSM" signal, it wouldn't waste any battery because there isn't A GSM RADIO.
 
That is it right there! I came to that conclusion lastnight....Let it sit and it swill last u alllll day. Soon as u start texting and surfing that's when it dramatically drops
 
I put my phone into airplane mode the other night at 100% charge, did not have any apps running & woke up with it at 49%. The battery usage on this thing is a mystery.
 
LS1 said:
God god, the CDMA trick is bullshit. Even if it was searching for a "GSM" signal, it wouldn't waste any battery because there isn't A GSM RADIO.
Click to expand...

I tend to dis-agree there. And you don't get the concept do you? It's searching for other cell company towers while roaming, even though it can't connect to them. Look at your roaming settings, you MANUALLY have to change it to "Sprint only." Get your facts straight buddy, I really don't think you feel like having this discussion with an IT specialist.
 
hendodo said:
That is it right there! I came to that conclusion lastnight....Let it sit and it swill last u alllll day. Soon as u start texting and surfing that's when it dramatically drops
Click to expand...

Didn't have that issue either. I spent about 3hrs browsing the market/watching youtube vids and whatever else over Sprint's network. Went down about 20%. That's bad?
 
SolApathy said:
I put my phone into airplane mode the other night at 100% charge, did not have any apps running & woke up with it at 49%. The battery usage on this thing is a mystery.
Click to expand...

I think it's more or less how smart you are with your. I love how people complain about it having battery life issues when all your radios are on. Just don't be an idiot, plain and simple.
 
VSpike915 said:
Didn't have that issue either. I spent about 3hrs browsing the market/watching youtube vids and whatever else over Sprint's network. Went down about 20%. That's bad?
Click to expand...
That's pretty good if that was nonstop use. Meaning the screen was on the whole 3 hours
 
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