Warnings: Read Instructions Before Use: We recommend charging Duracell NiMH rechargeable batteries only. Do not attempt to charge non-rechargeable batteries. Misuse could cause batteries to rupture, causing personal injury or damage. Indoor use only. Dry location use only. Risk of electric shock. Never disassemble or alter any part of the charger or batteries. Charger or batteries may become hot during charging and will cool down when charging is complete. Keep batteries away from children. If swallowed, consult a physician at once. For information on treatment, call (202) 625 3333. Keep batteries away from children. If swallowed, consult a physician at once. For information on treatment, call (202) 625 3333 collect. Never use different battery brands, types, capacities, or systems at the same time. For proper insertion, please observe pole indications (+/-). Duracell battery charger recommended. Keep batteries away from fire, or explosion may occur. Customer Service Number: 1-800-551-2355 (9:00 AM-5:00 PM EST).