Rechargeable battery on a drill I took from my dad (too long ago to return) is now totally dead. What to do? Take the drill apart, reuse the parts (motor and gearbox) for an awesome new project and buy a new drill? Buy a new battery? Fix the battery? Battery pack holds 8 1.2V Ni-Cd batteries each giving 1200mAh connected in series resulting in 9.6V 1200mAh power supply. Replacement pack is about 30EUR (quick check on Amazon); I'm not sure that I can get a compatible replacement anyway. New batteries would cost roughly the same (but I could install 2000mAh ones).
While unscrewing I though: "I need a battery screwdriver." I will check for a new pack in local store while buying a screwdriver. Until than back in toolbox.
In case you are wondering (and I know you are not), the power control in drill is made with FDB5680 N-Channel MOSFET.
