Find Batteries, Chargers, and Adapters at Target.com! These batteries are designed to be used as a replacement to the ones that come with the solar lights. The 4 Pack AA 2000 mAh Ni-Cd Batteries have a high charging capacity. The batteries can provide power for long hours after the solar panel in the garden lights charge them. You do not have to worry about durability, as these batteries have been deemed safe for use outdoors.