When you have a solar powered battery charger, you can be sure that your batteries are charged, no matter where you are. Take it with you on a trip to a different country, out camping, or leave it in your car for “just in case.” Always have batteries ready for your palm pilots, CD players, and MP3 players, etc. This Travel Solar battery charger can be used to charge up to 4 AA batteries. An overprotection circuit prevents battery overcharge. Features * 1 year warranty * Charge 4 AA batteries or AAA * Small, compact, easy-to-store * Compatible with either NI-MH or Ni-Cad * Lifetime 10-15 * Lightweight design * Fast-charging Specifications * Manufacturer: Siliconsolar * Weight: 6 oz * Dimensions: 3.75x2.5x1 inches