Holy Stone 1 * 7.4V 2800mAh Modular Rechargeable Li-po Battery for RC Quadcopter Drone HS700D Black
Charging Method:After connecting the Battery, Charging base and USB Charging Cable, connect the USB Charging Cable to the power bank or a phone adapter to charge (5V, 1-2A)
Charging Status: When charging, the green light flashes quickly and the red light is always on. When fully charged, the red and green lights will be on.
Charging Time:About 5-7 hours