ATC LLC via Amazon offers Prime members the Masione 18-volt 2,000mAh Ni-Cd Replacement Battery for Black & Decker, model no. HPB18, for $22.99. Coupon code "Q56Z7T7D" cuts it to $17.99. With free shipping, that's tied with last month's mention and the lowest total price we could find now by $6. It's compatible with Black & Decker 18-volt tools and chargers. Deal ends October 16.

Don't have Amazon Prime? Click "3 new from" and add the item to cart via ATC LLC not fulfilled by Amazon. Apply the above coupon for a price of $17.99 with free shipping.