The Gama Sonic 2-pack 3.2-volt, 6,000-mAh, 4-cell replacement Lithium Ion battery pack is for Gama Sonic outdoor solar lights and lamp posts. This lithium-ion battery pack is crafted to last 1,000 charges, which is approximately 3 years. Consult your owner's manual or the Gama Sonic website for instructions on replacing the old battery pack in your solar light fixture. Follow your municipal/regional waste-handling policies for proper disposal of the old battery pack. Do not remove outer wrapping.