REVIVE REPAIR the old batteries BOSCH NiCd - YouTube
Teardown: Bosch 18V Core18 4Ah battery. I've never seen anything like this! - YouTube
Amazon.com: X-Adapter 1x Adapter for Ryobi 18v Tools Works On Bosch 18v Blue Professional Batteries (Not 18v PBA All Battery)- Adapter Only, Black (BS-RY18) : Tools & Home Improvement