I used my EVO for navigation while on vacation last week. Now, back to work, I just most make calls and texting. On Monday, after all night on charge, the battery was almost dead by 2 PM. I thought it odd, I have never come close to draining it on a regular work day. Then it happened again today, so I look at what has been draining the battery and it said 81% "maps". I haven't used maps this week. I looked at advanced task killer and it didn't show "maps" as being open. I took the battery out and rebooted it and now it is charging. Any ideas?