aventon SINCH Owner's Manual page 16

When you're completely done riding your bike, power o to
prevent accidentally engaging the motor while parking. Never
leave your ebike powered on when parking, hanging from a hook
in the garage, or while loading your ebike onto a car or truck rack
for transport.
If your ebike ever needs repairs or maintenance (for example:
to fix a flat tire) always completely power down the ebike before
starting work.
13 SINCH OWNER'S MANUAL