150mA Solar Battery Charger, Charges AA or AAA Batteries, Devices, Radios, ToysNote: Rechargeable batteries are not included. The charging circuit is designed to charge 4 batteries in a series (4. 8v). Do not attempt to charge only 1 to 3 batteries at a time you MUST have 4 rechargeable batteries (same brand and size) in the battery compartment for charging. This folding solar panel battery charger is convenient for charging AA or AAA batteries, along with small devices such as radios, cassette players, portable videogame