Magic smoke is not a good sign. Where is it getting hot? Does the battery run down faster than it did? My first guess would be a bad spade lug connection. Due to high resistance, it gets hot and burns the insulation. The drill would also exhibit low power. But if the battery is running down fast, it may be a circuit short. However, a circuit short would yield more symptoms.
It may start if the shaft is turned to a certain position, but then not run will. The seating operation might have left something shorting the commutator.
they keep coming up with ideas to prevent one from fixing, don't they? I have not seen a screw like that either. It appears to be called an E5 security screw and this company seems to be the only one with a bit that MIGHT work. The bit is actually meant for a different type of screw head.
there is double face tape at each end of the chromed plastic piece along with the tabs that need to be unhooked when prying off. So be tender and do not use brute force. Also, the clear plastic piece will likely just fall out so be aware.
You must use a very small blade Phillips screwdriver. A #0 will be too big. Significant downward pressure is also needed to break the screw loose and prevent stripping the screw. It feels like they are glued in. The battery is available in many places and is a 14500 type rated at 750mAh with a 4mm tab on the positive side and a 2.5mm tab on the negative side.
there is double face tape at each end of the chromed plastic piece along with the tabs that need to be unhooked when prying off. So be tender and do not use brute force. Also, the clear plastic piece will likely just fall out so be aware.
You must use a very small blade Phillips screwdriver. A #0 will be too big. Significant downward pressure is also needed to break the screw loose and prevent stripping the screw. It feels like they are glued in. The battery is available in many places and is a 14500 type rated at 750mAh with a 4mm tab on the positive side and a 2.5mm tab on the negative side.