LANDVO&reg; Upgrade 7.4V 650mAh Lithium Battery for JJRC H8C H8D RC Quadcopter Spare Part Silver Pack of 2 2 Pack upgrade 7.4V 650mAh li-po batteries aim to extend the flight time High quality and rechargeable performance, can be recharged about 500 times Great backup battery to power your RC toy, one fully charged battery can provide a 9-10 minutes flight time Suitable for: JJRC H8C, H8D rc quadcopter Dimensions: 5.2 x 2.5 x 1.4cm (L x W x H), Charging time: about 100 minutes. Please note that the charger recommended as Frequently Bought Together with title ThinkMax 4-in-1 4 Battery Charger for Hubsan By Thinkmax is NOT for these batteries!