(as of Sep 16,2020 02:37:51 UTC – Details)
Holy Stone HS720 Drone Battery 7.4V 2800mAh Rechargeable Li-Po Battery for RC Quadcopter
When charging, the charging indicator light of the battery will flash green quickly and the power indicator light will be red.
When fully charged, the green and red light will turn solid.
Charging Time: 5-7 hours