If I drop my Tama-Go even if it's less than a foot, the screen fades to white and drains the entire battery. Does this happen to anyone else? It's a wave 1 if that helps.
Its probably hitting hard enough to remove the batteries. To help to keep them in, you could put some art foam over the top of the batteries before you screw in the back. Or tape it...
The draining power thing... Its probably trying to keep working partly attached inside.
I have a Wave 1 and it seems OK. I have dropped it at least 5 times and the screen hasn't been damaged. Except for the strip of dead pixels across the screen. That happened when I was on holiday and it got really cold at night and it wrecked my Tama. So no, my Tama hasn't been damaged (as far as I know) from being dropped.