Compatible with this Drone models:
VISUO XS809W XS809HW,X809,XS809C Foldable RC Quadcopter Drone
Battery Features and Benefits:
Material: plastic + electronic components (batteries have MSDS and UN38.3 test report)
3.7v 900mah batteries
1 to 3 Charger
3 USB Charger
1)When you receive the item,inspect the battery for any damages or swelling .Don't charge a damaged battery or a swelled battery .If you have any issue ,please feel free to contact me.
2) Don't overcharge the batteries.I suggest that you should use the charger with the overcharging protection function. 3)Make sure that the batteries are charged in the safety place.