I personally like the Callies Kustom's 3100ma. But they are many panasonic resellers that offer a cheaper price and maybe just as good. Check out member HKJ
batterry test.
For charging I like the hobby charger for its broad versatility. You can charge several batteries at once or just one. You can check capacity and voltage sag at given currents. You can set the charge rate low to extended the life of the batteries or you can increase the charge rate to max (Battery Manufacter recommended Max) if you need the batteries charged up as soon as possible. And can charge almost all rechargable battery chemistries. Very versatile. If you are only going to charge li-ion's there are several other option's which maybe better or easier. The hobby charger requires a little learning curve to operate, nothing to hard to understand though. Pretty simple to learn actually. I like the all in one hobby charger. Hobbyking has several to look at. Just my two cents.