Please help! My tablet's battery is dying fast!? I have a Lenovo IdeaPad A1 Tablet, and the battery doesn't last as long as it should. When I go to settings and view what's using my battery, it says that "Cell Standby" is using 79%!!! Also, on my lockscreen, at the top right corner, it says: (No Serivce). So does my tablet have a cell phone antenna inside? Is it constantly searching for a signal? Please help!