Amazon.com: 18V Battery Adapter for Hitachi to for Makita Lithium Battery, DC DC 18V Battery Converter for Electric Tools, No Need Buy One More Battery : Tools & Home Improvement
Battery for SKIL (p/n: 92490, 92927, 92931, 92993), 1.5ah 12v Ni Cd|Storage Batteries| - AliExpress
Hitachi Koki 7.2V cordless driver drill, battery & Charger made in Japan | eBay