HTC EVO 4G have battery issues? Root it, problem solved

I love my EVO, but hated how fast the battery drained. I had the app killers and battery monitors but nothing helped. On the stock battery I could manage almost eight hours of use between charges.

So I ended up buying one of the extended batteries, which require a new case back since the battery is larger. I was pulling about 14 hours at first, but it crawled down to a measly 5 hours eventually.

I decided it was time to root my phone and take advantage of the custom kernels that help save your battery with voltage scaling. Basically that means it turns down power useage when it isn't needed.

With the help of a guide on Good and Evo I rooted my phone, got a custom ROM and kernel and now I am on 18 hours of uptime with 60% of the battery still there. This is with the same battery I was getting 5 hours from before.

There were some problems with the root that the guide didn't cover. I initially read through the comments and saw one of the problems had to do with apps, so I removed a ton of them, but that didn't help. The issue was one of the files not getting deleted between the boot ups and hanging. Then making it fail if you tried the process again.

The name of the file slips my mind, but you get an error that the process died unexpectedly. Just find that app (the name is in the error) and just remove that app, and run the root application again.

UPDATE: With average phone and internet use I am netting 29 hours of uptime with 14% battery remaining. This is with 4g off, leaving 4g on all the time drains the battery fast, I haven't tested the life on that yet though.