DEWALT 18-Volt 2-Pack 2.4 Amp-Hour; 2.4 Amp-Hour Nickel Cadmium (Nicd) Power Tool Battery Kit in the Power Tool Batteries & Chargers department at Lowes.com
2 Pack 18V for Black and Decker HPB18 18 Volt 6.0Ah Battery HPB18-OPE 244760-00 | eBay
Makita USA - Product Details -BL1860B
Direct factory 3.6 Ah 18V Cordless Power Tools PC18B PCC489N PCMVC Ni-CD Compatible Replacement Battery (2 Pack)