The charger has given up for my 9-year-old drill. My local tool store reckons that none available now, which is what I thought. Is it possible to use a small power supply that I have which is similar voltage and rating as the original charger, that is, 12V and 220mA, as a charger? Connection to the battery would be by crocodile clips, I know which is +ve on the battery. Anyone ever tried this? Any advice appeciated, thank you.