Battery Charger blinks while charging

When I connect my battery to the charger for charging, the LED starts flashing green/red.

  1. In principle, if the charger is flashing, there is an electronic fault – either in the battery or in the charger itself.
  2. Check whether the battery and the charger have the same voltage specification – you can find the specification on the back of the charger and on the battery label: 36V batteries are charged with 42V charging voltage, 48V with 54.6V charging voltage.
  3. If possible, try to charge the same battery with another compatible charger (make sure the voltage is correct!) or charge another battery with the same charger.
  4. Please contact UD Technical Support via email: support(at)