Li-Polymer batteries are the newest available batteries for airsoft and other hobby toys. They are designed as a light weight, high output power source. This 7.4v Li-Po battery can deliver more power than 7.2v Ni-MH large type battery with only half of the size and a third of the battery cells.
Note: it is always recommend to double check and the battery pack dimensions with the your gun’s battery compartment to make sure it fits.