Craftsman C3 19.2-Volt Lithium-Ion Compact Battery & Charger Starter Kit Includes: 19.2-Volt Compact Lithium-Ion Battery and 30-min. Multi-Chemistry Charger Lithium-ion formulation delivers a longer life cycle and larger reserve than Ni-Cd batteries, at a much lighter weight Smart design lets this battery slip into the charger and snap into tools Built-in charger diagnostic program checks batteries with every charge Charges 12 and 19.2-Volt Batteries