This Multivolt set offers the power of a corded tool, the freedom of a cordless platform and the choice to operate all Multivolt tools with a battery or plug into an outlet - cordless or corded. This starter kit features a lithium-ion slide battery and a charger. The battery delivers over 1,440 W of power. The charger has a built-in USB port and will charge Hitachi(R) and Metabo HPT(R) 18 V batteries. The battery is backed by a 2-year warranty and the charger is backed by a 1-year warranty.