I bought 2 back-up batteries: a 2nd standard size battery and the bulky extended life battery.
Now I really need a couple of external battery chargers so I can keep the back-ups charged and ready to go. Anybody seen these yet?
I do have a Seidio Multi-Function Charger, but they don't yet have model specific part for the Thunderbolt.
I've also seen some of the super cheap things on eBay, oftentimes budled with 2 or 3 batteries for like $12. Obviously total junk. Since the batteries are 1500 mAh, I think most (if not all) of these are actually for the Sprint EVO 4G and won't even fit, even if I wanted to buy junk, which I don't.