Hello... Am new here.. I'v been using a L620 since 1 year now and few days back i played asphalt 8 in my cell continously for a long time like 6 to 7 hours with my charger switched on and plugged into my lumia... now its been almost 3 to 4 days and the battery estimated time remaining has dropped to 11 hours after one complete full charge... ... Can anyone please suggest me wat to do in order to bring my battery backup back to normal???? Anyone any ideas?????