About original battery, which came with the phone. No WiFi, no SIM card, no cellular connection, no GPS; no desktop widgets. Playing "Blocks" continuously drains battery in five hours (from fully charged to low). If there were WiFi and GPS in background while playing "Blocks", it would drain faster. @BigTony What about testing this new battery? Turn every connection off and play "Blocks" (with goal to get the highest score possible in this game), how long will it take until notification "Battery low"? Make sure it's fully charged in the beginning. Don't consider me heavy player; it was a one time accident, and I don't think I'm going to repeat it.