BLACK+DECKER 20V 1.5Ah MAX Lithium-Ion Battery (2 Pack) - Charger Not Included

With a longer lifespan and the ability to hold its charge five times more than similar nickel cadmium batteries, this Black & Decker's 20-Volt Max Lithium-ion battery is a great choice. It's ready to go when you are, retaining its charge up to 18 months. It's backed by a two year warranty.