Electric wheelchairs are propelled by a motor and battery. They are very sophisticated. They are operated with a joy stick or push buttons. Some electric wheelchairs use advanced technology and can climb up stairs, move across gravel and even raise up to give access to high shelves. Electric wheelchairs need strong frames to support the motor and battery so they are very heavy and also quite expensive. The average cost of an electric wheelchair is $7000 but can fall anywhere from $3000 to $30,000.