I had a completely opposite issue, I plugged in the charger to dl update, and when it was done it was fully charged ( it was in mid to low 90's when I started)

But it is charging for me at the moment.

 

Ignoring the battery icon, is the LED indicator coming on (the amber one) to show it's charging?

 

Let me point you here. EarlyMon has this one covered pretty well:

http://androidforums.com/support-troubleshooting-evo-4g/140705-new-bug-i-found-2-2-its-really-aggravating.html#post1296067

 

I'm having the same problem. At first it wasn't even saying it was charging at all and the lightening bolt wasn't showing up on my battery icon. I removed the battery and now after putting it back in, it says that it is charging, and the lightning bolt is showing up on my battery icon, however, it doesn't appear that it is actually charging (Still stuck at 5%.) the only running service I have is the keyboard. When I unplugged it to see what was using up all the battery, it says the Display at 62%, Android system at 26%, Standby 6%, Mediaserver 4%(I assume this is my multimedia station stuff, but don't really know) and Android OS 3%.

I've never rooted my phone, and don't have a task killer app installed, which others have indicated may be the cause of the problem on other forums.

UPDATE

It seems to be charging now. If it keeps a charge, I'll let you all know. If it doesn't, I'll try some of the tips in that post you linked to Teky.

 

Welcome to the forum, wish the circumstance was happier.

We've seen a few possible causes for this:

1. Bad usb cable or charging port might be going bad. Surprising as it sounds, people have usb cables fail more often than one might think and because we're always doing something on our funny-acting Android phones, we always want to trust the cable. It's always a great place to start, though.

2. The fact that it started to somewhat act right after a battery pull indicates a process might be stuck. This link gives the full procedure to deal with that - it's not 100% guarantee, but it's worked for an overwhelming percentage of these cases:

http://androidforums.com/support-troubleshooting-evo-4g/141369-how-fix-froyo.html

3. Take this as parallel in importance with the one above: you may have done an app update recently and it's gone rogue, for whatever reason. I've had that happen myself. Truth is that Android is running far more processes/services than the simple tools will ever suggest to you. For example, for a non-radio-related app, I had my phone go nuts in power consumption because in the background it was trying to validate a 4G connection MANY times per minute (I don't _have_ 4G!) and wifi was cycling on/off in less than a second. Sometimes, finding and re-installing the bad app can help - sometimes you have to go to the How-to-fix-Froyo advice (and sometimes even then installing apps one by one from the Market).

4. You could have a corrupted SD card directory, and you can fix that on your PC (Win or OS X) - surprising that the SD card could affect you that way, but not if you have an app (such as your media player) that's actually getting a little lost trying to access something on the card.

That's all I've got off the top of my head - post back your observations.

PS - Not knowing your usage or background - are you a Facebook user? Many have reported trouble related to that.

 

Fwiw, and I know.it won't really help. Had exact same problem when I dated to .3. Charging just stopped working. Have 4 spare batteries and 2 wall chargers so no real issue.

Did the .3 to .6 update and problem fixed itself. Strange. But thought I would share.