I have a similar problem I need a new battery for my older 36V Blix Vika Its a tall skinny battery with a 4 pin discharge connector. The dimensions are key to the fit in that it slides in to a small area, approximately 387.5 x 76.2 x 89. When standing on end the ignition key lock is located at the top side, charger port on the opposite top side, and the discharge 4 pin is on the bottom. Blix no longer carries this battery - already tried. Can someone point me in a good direction for sourcing a battery that will work?