Get additional play time by obtaining extra batteries! When batteries begin to show signs of overheating, low performance, and/or leaking, it may be time to get replacements. These new and outstanding condition Ni-Cd will ensure that play time won’t be cut short! NOTE: Make sure to follow safety precautions. Do not leave battery unattended while charging. Do not over-charge and over- discharge. Always ensure the battery is on a non-flammable surface. If corrosion, heat generation or other abnormalities with new Nickel Cadmium batteries are detected, stop using them immediately. If the Nickel Cadmium battery terminals become dirty, clean them with a soft, dry cloth prior to use. Dirt on the terminals can result in poor contact with the equipment, loss of power or inability to charge.