I was getting low flight times as well until I ditched the stock battery plug and used a regular micro jst(?) plug. Flight times doubled. This is what I ordered: Crazepony Blade Inductrix Power Battery Kit with Propeller Cable Charging Board https://www.amazon.com/dp/B01LZVBOIA/ref=cm_sw_r_cp_api_ldVFybE4S5AW2