Dead Autel km100 solution. If the battery is fully discharged and cannot be charged and turned on anymore, open km100, disconnect battery and attach power 4.2-4.4v directly to battery terminals + and -. Keep it for 10-15 min. Then assemble all together, connect Charger to usb-c and it will work again. I use Dc power adapter with output 4.2v 500ma.
This must override the battery sense circuit.
Since, the battery is fully discharged, the sensor cannot detect battery presense.
