Rechargeable, deep-cycle, lead-acid batteries for powered wheelchair and scooter users.
D003365:Costs and Cost Analysis; D011211:Electric Power Supplies / Q000191:economics; D004867:Equipment Design / Q000592:standards; D006804:Ergonomics; D005069:Evaluation Studies as Topic; D006801:Humans; D008283:Maintenance; D014910:Wheelchairs / Q000592:standards*