This Lithium Polymer battery has been tested extensively with the 400e and performed reliably with no failures. Expect well over 1000 shots per battery charge. This LiPo is a 11.1V, 3S1P configuration with cell voltage between 3.2-4.2V. It has a 2200mAh capacity and 35C discharge rate. The main lead is a Deans connection or T plug. Charger listed below in related products.