It does not work as a charger for rechargeable batteries. Non-rechargeable batteries are not to be recharged. Batteries are to be inserted with the correct polarity. Remove exhausted batteries from the toy. Battery replacement must be carried out by an adult. Do not dispose of batteries in fire, they could explode or leak. Only batteries of the recommended or similar type should be used. The battery terminals must not be short-circuited. Do not mix alkaline, standard (carbon-zinc) or rechargeable (nickel-cadmium) batteries. Do not mix new and old batteries. If you store the product for long periods of time, make sure to remove the batteries.