Had the same sort of problems. First car charger wouldn't work, then wall charger, finally having problems with USB port. Called AT&T and they wanted to send me a new battery. Probably should have taken them up on that and gotten a free battery, but I'm concerned that soon I won't be able to charge the phone at all. Took me 30 mins last night to get it to charge from the USB. I convinced AT&T that it wasn't the battery since the battery works just fine when I do finally get it charged. My son also has an Infuse and has not had aany problems. Seems like a mfg defect to me.