This Arena Edition battery is enough safe and powerful with high efficiency of 20C continuous discharge rate, high capacity of 1200mAh and a good heat dissipation. It is made of high quality Lithium to prevent your worry from long-term storage and it enables to deliver the best performance for your airsoft. It is a perfect backup for your airsoft, which suits Airsoft M4, Crane Stock, M110, SR25, AK47, MP5K, MP5, SCAR, M249, M240B, M60, G36, M14, RPK, PKM, L85, AUG, G3.