I RMA'd my battery a week ago to Asus UK who promised me another battery within a week. Guess what? They failed to deliver, I rang them up and they said that they don't have the R1F battery in stock and they've had to order one from Tiawan. No apoloigies and the woman I spoke to was very offhand and said that it may well be several weeks until I receive one. So I'm tied to mains power at the moment and not very happy. You'd think a large company like Asus would be more organised.