Heli-Max LiPo 1S 3.7V 250Mah 1SQ Battery FEATURES: Made especially for the 1SQ Quadcopter Replaces worn or damaged LiPo batteries INCLUDES: 1S 3.7V 250mAh LiPo Battery (key #3) with White Connector REQUIRES: Charging with the Quadcopter charger (HMXP2023), if using other charger, see COMMENTS below