New technologies have been applied to Ni-MH rechargeable batteries, resulting in high capacity and high voltages. Ni-MH batteries belong to a group of batteries that have a powerful energy density, which is why they have a higher capacity for the same volume than batteries made with older technologies. A pack made from Ni-MH cells is ideal for use in airsoft guns. An unquestionable advantage of NiMH cells is that they do not have the memory effect like NiCd batteries, which significantly extends their service life. An additional positive feature is the ratio of weight to capacity.
Bought this gun for the E&L AK74M, it does fit without the upper reciever. when you want to put the upper reciever on you have to pull back the bolt so it will fit on it. but if you release the bolt after youve put on the upper reciever the bolt will not fully close. this battery is too big for the gun!