Sola Solar Battery Charger Current Flow Meter Analyses the Solar Yield Accepts both NiCad and NiMH Batteries (Of Course, Batteries Not Included) Charges "AA", "AAA", "C", "D", and Prismatic (Gum) Batteries Charges Simultaneously LIFETIME GUARANTEE - Rest easy because your solar charger is protected by Sola's Ironclad Lifetime Guarantee; Their satisfaction and quality guarantee makes these battery chargers perfect household gifts for family or friends, too; If you want the best - this is the device for you