Years ago my wheelchair was stolen and the thief’s trashed the wheelchair causing about £1000 worth of damage. Luckily the local community chipped together and raised enough to get the wheelchair back to its former glory.
To stop this happening again Datatool offered to supply me with a Demon Evo alarm system. This wires directly to the wheelchair battery and is sensitive enough to sense if the chair is moved slightly.
Not only does this alarm detect movement but you can also attach a pressure sensor which would also set the alarm off. I plan on getting one large enough to place under the seat cushion to detect if anyone sits in it.