Also called Li-Poly or LiPo. A rechargeable battery technology that has evolved from Lithium Ion. Lithium Polymer batteries do not require a steel can like AA and Sub-C batteries, so they can be manufactured in a flexible casing. However, this flexibility comes at a cost. Lithium Polymer batteries have a smaller charge-per-pound ratio than Lithium Ion batteries. The main improvements are that they can hold a greater charge-per-pound than NiMH batteries and don?t have the horrible memory effect that Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCD) batteries do. If overcharged, the battery may explode into a large fireball.