Official response from HTC RE: How to double battery Life (WORKS!) + 2nd Reply
I wrote HTC about some of the problems we have been having with the EVO, namely battery life. Here is the response I just received:
Originally Posted by htc
Dear XXXX XXXXXX,
Dear XXXX, HTC and Sprint are taking steps to improve observed battery life. HTC is developing a number of handset software optimizations that are expected to increase device operating times. These updates are expected to be available as part of software pushes scheduled for later this summer. As with any software development effort, we cannot provide an exact date. Additionally, Sprint is working to optimize 4G network settings to improve battery life for customers in 4G markets. I will be happy to go over various setting with you that will help extend the battery life. Traditionally WiFi, GPS, Bluetooth, and display brightness all greatly impact battery performance. With Android 2.1 another feature that can kill your battery are the Live Wallpapers. If you’re using Live Wallpaper just turn if off. Adjust the Brightness of the display (Menu | Settings | Sound & Display | Brightness). By default it is set to auto adjust but you can manually adjust it down. Consider adjusting the display timeout (Menu | Settings | Sound & Display | Screen Timeout). The default value is 1 minute but you can reduce it to as low as 15 sec but 30 seconds. By default your HTC Incredible vibrates every time you press a key. Turn it off by un-checking the box ‘Vibrate when typing’. Menu | Settings | Language & Keyboards | Touch Input | Text Input | Vibrate when typing. If Facebook, Twitter, MySpace, Email, App Updates, or many other things are constantly popping notifications, consider turning some of them off as notifications do impact battery performance; This is done in each app. To also help with Battery Life you can do these steps exactly: 1) Turn your device ON and Charge the device for 8 hours or more 2) Unplug the device and Turn the phone OFF and charge for 1 hour 3) Unplug the device Turn ON wait 2 minutes and Turn OFF and charge for another hour Your battery life should almost double, we have tested this on our devices and other agents have seen a major difference as well. HTC has received some reports regarding this issue with the screen seperation, and are currently analyzing the potential causes. Most customers are not reporting any issue related to this problem. The issue appears to be cosmetic and should not affect the operation of the device. Additional information will be provided after we finish our investigation of the issue. If you have any other questions or concerns please Reply back to this email or give us a call at our HTC Technical Support Line, 1-866-449-8358. I want to thank you for contacting HTC. In order to help improve our service I’d like to invite you to take a survey at http://survey.htc.com/worldwide, you can also checkout http://shopamerica.htc.com/homebrands/index.htm for more information. HTC Technical Support http://www.HTC.comhttp://www.Facebook.com/HTChttp://www.YouTube.com/user/HTChttp://www.Twitter.com/HTC
Interesting! I'm going to try that so called battery doubling trick asap!
2nd reply from HTC below
Originally Posted by htc
Dear XXXX, The EVO 4G and the Incredible are having the same issues with the battery, I do apologize for saying Incredible, but I didgive the correct answer. This battery charging regimine is a one time operation, if you need to do this more than once a month, I would talk to Sprint about a replacement battery, but with the batteries we are looking into the issue further. We are not sure why this works, we like our customers have the HTC phones and were looking into forums and found this and it worked on all of our agents batteries, they all gained about 10 hours of battery life with regular use. We have also, tested how long the batteries take to charge and yes, this battery takes about 4 hours to charge, we are looking into this, but it is not an issue that will harm anything. You should be able to charge your battery while sleeping and you should not have a problem with the battery lasting all day, but again we are looking into the battery situation. With the Micro USB cables, most should work, but we recommend HTC Micro USB cables. You can go to shopamerica.htc.com or http://www.yourwirelesssource.com/do...uct?search=PCD for accessories for your EVO 4G. If you have any other questions or concerns please Reply back to this email or give us a call at our HTC Technical Support Line, 1-866-449-8358. I want to thank you for contacting HTC. In order to help improve our service I’d like to invite you to take a survey at http://survey.htc.com/worldwide, you can also checkout http://shopamerica.htc.com/homebrands/index.htm for more information. HTC Technical Support http://www.HTC.comhttp://www.Facebook.com/HTChttp://www.YouTube.com/user/HTChttp://www.Twitter.com/HTC
Ok, this battery charging trick has helped big time! I've been unplugged for 5 hours now and I'm at 80%. usually my battery dies at 6 hours. I just noticed my phone is not sleeping. wonder why that is? anyone know how to find out? wonder if it could be nimbuzz or k9 mail preventing it. I'm guessing the battery life would be really good if the phone would actually sleep.
edit: yup, it was nimbuzz, my IMing program preventing the phone from sleeping. damn, i need an IM program that supports push!! facebook push would be nice also.
That's basically like the fix that another user here on suggested. Charge the phone fully while on then turn it off, then unplug it. Once the light turns off plug it back in, It will then start charging again anywhere from 1 minute to 5 min when the green light is back on unplug it and do it all over again do this for about 10 times then turn on your phone and your battery life will be considerably longer.
Here is the original post on this technique and I CAN confirm it works. You do have to do it every time though to get the maximum battery life every time. I can get at least 15 hours of usage if I'm not using it for movies or music. http://forum.xda-developers.com/showthread.php?t=701567
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