I recently caused my integrated battery to short out by touching the locking key to the power port.  The battery shows 70% power.  When I put the charger on, the charger shows full power despite the battery showing 70% power.  The bike still operates.  Does anyone have a similar experience and does anyone know if the battery will accept a charge when it is run down to a lower level?  Also, is it safe to use the damaged battery? I have a Rad City 5 Plus.