520 mAh Lithium Polymer (Rechargeable)
The Lithium Polymer recharge extremely quickly, have tons of voltage, and last longer than a non-rechargeable battery, about 16 hours. This one will make your hand dance!
400 mAh Lithium Ion (Rechargeable)
The Lithium Ion batties recharge about half as fast as the Lithium Polymer ones. They will last about 400-500 charges then die. They do not have the same voltage as the polymer, but are still good. Lasts about 10 hours.
#3 - Average - standard non rechargeable battery (12-14 hrs)
Most of these last fairly well and have good voltage. Costly as you cannot recharge them. Last about 12 hours.
#4 - Total Crap - Energizer
150 mAh NiMH (Rechargeable)
Worst batteries I've ever used. Last about 4 hours, take forever to charge (12 hours) and do not crank much voltage. Save your money, these are a scam, like all energizer products. They are the most expensive of the bunch too, wonder what the bunny was smoking.