aventon SINCH Owner's Manual page 23

6. Allow the battery to charge overnight.
7. Once charged, remove from wall power and check for
proper operation.
Under specific circumstances you might see one single LED
flashing constantly on the battery. One blinking LED is a warning
of excessive strain on the battery for its charge level. To correct
this issue:
• Reduce the strain on the battery and charge the battery. If
it will not take a charge, please take the previous steps to
resolve the issue.
SINCH OWNER'S MANUAL 20