NOVELTY - The battery housing (100) has a movable base (10) and two elastic conductive plates (30). The movable base has a configuration corresponding to that of the rear part (220) of the body (200) of the scooter. The housing includes at least two isolated battery compartments (14) for each receiving a battery (20), an electrode contact provided at a bottom of each battery compartment, and an electricity chamber (17) for accommodating a charger (18) and a length of power cord (19) connected to the charger.    USE - For mounting on a medical scooter to facilitate easy and safe mounting, dismounting, and recharging of batteries of the medical scooter.    ADVANTAGE - A quick and safe separation of positive and negative wires can be performed whenever the batteries are dismounted. The batteries can be easily dismounted and re-mounted without consuming too much time and labor. The isolated battery compartment and the upper cover provide the battery housing with better watertight and moisture-resistant ability to protect the batteries from water and moisture, thus ensuring good performance and longer life of the batteries. The batteries are handles in a safer manner.    DETAILED DESCRIPTION - The provision of recesses (260) and drain holes (261) in the recesses enables draining of water accumulated around the positive power supply wire (270), the negative power supply wire (280), and the elastic conductive plates to protect such elements from damage caused by accumulated water and any acid corrosion.    DESCRIPTION OF DRAWING(S) - The drawing is an exploded perspective view of a medical scooter having a battery housing mounted thereon.    Movable base (10)    Battery compartments (14)    Electricity chamber (17)    Charger (18)    Power cord (19)    Battery (20)    Conductive plates (30)    Battery housing (100)    Scooter body (200)    rear part of the body (220)    Recesses (260)    Drain holes (261)    positive power supply wire (270)    Negative power supply wire (280)