Yes, I think that's the right one. If your phone's battery won't charge, you can try the so-called "http://xdaforums.com/showthread.php?t=892026" to charge it, or just buy an external wall charger.
You could also try plugging it into a computer USB port overnight. Someone in these forums said recently that that trick worked for him, even though it wouldn't charge when plugged into a wall outlet.
Is it possible to flash someother sbf file into my defy??