Safety warning: To avoid personal injury and property damage from, but not limited to, the risk of electric shock or fire: ­ Charge only Nickel Metal Hydride (NiMH) rechargeable batteries. Charging any other types of batteries may cause them to leak, rupture or explode. ­ Do not open battery, dispose of in fire, put in backwards, mix with used or other battery types or short circuit ­ may ignite, explode, leak or get a hot causing injury. ­ Use the charger only in dry locations. Keep away from rain, snow or excessive moisture. ­ This charger is intended to be in a vertical or floor mount position. ­ Never plug battery chargers into an extension cord. ­ Do not operate the charger if damaged. ­ Do not disassemble, modify any part of the charger, or attempt to use the charger as a power source. ­ Unplug before attempting maintenance or cleaning.