Lowe's has Craftsman V20 20V 4.0-Ah Lithium-Ion Battery (CMCB204) for $39. Shipping is free for My Lowe's Rewards Members (free to join), otherwise choose store pickup where stock permits.

Note: Availability for pickup may vary by location.

Thanks to Community Member kivfer for finding this deal.

Features:

• Longer cycle resulting in an extended battery life
• Battery charge feedback: 3-LED state of charge indicator
• Maximum productivity: No memory and virtually no self-discharge
• Common applications include powering V20 cordless tools, powering V20 cordless outdoor tools