Thumb Score: +12 Lowe's [lowes.com] has Kobalt 24-V 4Ah Battery (KB 424-03) for $39. Shipping is free for Lowe's Rewards Members (free to join [lowes.com]) or choose store pickup where stock permits. Lowe's [lowes.com] also has Kobalt 24-V 2Ah Battery (KB 224-03) for $19.98. Choose free store pickup where stock permits otherwise shipping is free for Lowe's Rewards Members (free to join [lowes.com]) on orders $35+