Hi I just bought a cheap $4.00 universal battery charger from Ebay and started charging it last light and popped it in my Evo this morning and the battery stayed at a full 100 for a half hour with with barely any usage, which is how it should be if you don't use your phone. When charging the battery in the Evo, It would go from 100 to 90 in 10 minutes with no usage. When charging it with the battery charger it stayed at a 100 for 20mins with no trickle down effect. I'm going to do some more test, but so far I think its a flaw in the Evo hardware circuits for it to lose battery power so fast with minimal usage. I'll post back with more results