Sphero comes with his very own induction charger. When his battery runs low, you can revive him heavy side down in the charger. To find his heavy side, place him on a hard surface like a table. Sphero will naturally settle with this sweet spot at the bottom. Pop him in the charger in this position. The charger will blink blue when charging begins. After about 3 hours, the blue light becomes solid and Sphero is ready to roll. He will play at top speed for up to 60 minutes before he needs another rest.
PLEASE NOTE: If the charger is not solid blue after 5 hours then Sphero might need to be adjusted so his heavy side is at the bottom of the charger.