https://tools.woot.com/offers/dewalt-dcb205-2c-20v-max-lithium-ion-battery-2pk-4 2-Pack 5Ah DeWalt 20V MAX Lithium-Ion Battery Starter Kit w/ Charger (DCB205-2c) on sale for $99.99. Shipping is free for Amazon Prime Members (must log in with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.