DIY Semi-Tr Igniter broke!

Semi-Transistorized Ignition emphasis module broke the day before yesterday, she stopped at the near part from my garage about 30 meter distance, I was forced to push and to guide by my muscle power alone to my place late at night, how come?
Remembering the past about unusual phenomena, the battery ruin until it could not activate the magnet switch on the starter motor, one of power transistor gradual decay must have proceeded at that time, I should recognize such kind of critical fracture in the important part at that time with out doubting except just a battery ruining because of age itself.
Gradual sealing break phenomena in the power transistor 2SC5352 caused current reek inside leading to the battery ruining! In another words, later additional ignition emphasis could cause battery ruin!