Do not mix old and new batteries. Do not mix alkaline, standard or rechargeable batteries. Battery installation should be done by adult. Non-rechargeable batteries are not to recharged. Only batteries of the same or equivalent type as recommended are to be used.
Batteries are to be inserted with the correct polarity.
Exhausted batteries are to be removed from the toy. The supply terminals are not to be short-circuited. Replace with new batteries at the first sign of erratic operation. Remember, your game will ewset to preset mode once you've replaced or removed the batteries. The store doesn't have replacement part.