Self Propelled Wheelchair With Power Assist A wheelchair powered by power assist is a motorized device that is attached to manual wheelchairs to assist the user move. It can be used indoors, over slopes and uneven terrain and for long distances. It can also reduce pain in the upper limbs. https://www.mymobilityscooters.uk/products/drive-devilbiss-healthcare-sentra-ec-22-self-propelled-wheelchair