[bast525]

I haven't tried one for the TP2, but I did buy a cheap chinese battery off ebay for my TP1. It was like $20. It also came with a standalone charger. But really it was not worth it.

a) I found that the battery life was significantly shorter than the OEM battery... at LEAST 25% shorter

b) the charger charged VERY slow... if I drained the battery to 40-50%, it would take several HOURS to charge fully

In the end, I gave the combo to a friend. I've only bought OEM spares since then...