SH150 scooter
 

New to this site so Hi everyone. I have a bit of a problem with my SH150 scooter. The battery went dead on it this summer so now I can't release the seat lock to unlock the seat so I can access the battery compartment to service the battery. Is there any way to release the seat manually or access the battery compartment without forcing anything? When the battery is OK I can release the seat lock with the ignition key but now I cannot because of the condition of the battery.
Any help or suggestions would be greatly appreciated.

Thanks.