DJI WB37 Intelligent Battery (CrystalSky & Cendence) LiPo Battery Pack for DJI CrystalSky & Cendence from DJI has a 4920mAh capacity that provides enough power to run a CrystalSky monitor for up to 4-6 hours, or a Cendence remote controller for up to 4 hours. If you have a 5.5" CrystalSky, then you will get between 5-6 hours of battery life, while 7.85" CrystalSky monitors will get 4-5 hours. DJI has engineered this battery to charge quickly and have an excellent discharge rate at low temperatures.