I just purchased a new battery (same one that I bought the Treo with) and one of those little battery chargers that plug into the power supply that came with the phone

That way I always have one on charge while I am using the other

A charger in the car is also a must

I bought my stuff directly from Palm but I don't think it really matters

I just didn't want to buy the extended battery and have it sticking out

This works great for me and how I use it

I hope that helps
