20V Lithium-ion, 2.0Ah Replacement battery pack for Genesis 20V Lithium-Ion cordless tools, including GLCD2038A, GLID20A, GCS2055A, GRS20A, GIW20AK, and GLGG20AK Fits all tools in the Genesis 20-Volt Lithium-Ion power tool lineup. Battery can hold its charge for over 18 months in storage.