The Rayovac Recharge 4 Position AA/AAA Value Charger will recharge 2 or 4 AA or AAA NiMH or NiCD batteries of any brand. This charger has a safety auto shut off feature which protects batteries from being overcharged. Rayovac Recharge AA and AAA Low Self Discharge NiMH rechargeable batteries are recommended. These batteries can be recharged 500 times providing long-lasting performance over and over again. Rayovac Rechage batteries hold their charge for up to 1 year when not in use. One year limited manufacturer's warranty. Rayovac is a trusted brand of Spectrum Brands Holdings, Inc., a top manufacturer of consumer batteries in the United States and Latin America. Spectrum Brands Holdings, Inc. is a global consumer products company and a leading supplier of batteries, shaving and grooming products, personal care products, small household appliances, specialty pet supplies, lawn & garden and home pest control products, personal insect repellents and portable lighting.