A week back my Stromer started acting weird. I replaced the disc battery in the control interface (where the spedometer etc is) and after diagnosing I found one of the wires has worked loose down by the motor (the other 2 wires screw together to ensure they do not become disconnected but this one does not...odd). That was giving me a no NO_BATT error. Well every thing start to work again except now the speedometer only indicates my speed as between 0 and 1.2 mph no matter what speed. Any ideas?