Plug the battery into a power source.
The V5 Robot Battery can be charged by first plugging pronged end of the V5 Robot Battery Charger into a power supply socket.
Then insert the rounded part of the charger into the battery's round charging port at its base.
Watch for the LED indicator lights.
Keep the battery charging and you should see green blinking lights increasing in number right to left.
Wait until four green lights indicate the battery is fully charged. Fewer green lights indicate only partial charge.
Note: A red leftmost light indicates that the battery is not charged or is not supplying power.