I charged my HTC Panache/Mytouch 4G for 4 hours last night until the light turned green . Then i checked a few messages and sent less than 5 sms' and one mms (which didn't end up going through .) So i set it aside, the battery was completely full . And i went to bed, when i woke up and checked my phone, my phone's battery was more than half gone . I got my phone on sunday and charged it twice including the time mentioned above .