Batteries - Otto Bock B 500 Bedienungsanleitung

11.8 Batteries

The standard version of the B 500/B 500-S wheelchair includes two 12 V lead acid batteries with a capacity of
60 Ah. During the charging process, the water acid mixture is converted into gas for a short time. The fluid level
must be checked on a monthly basis and be topped up if required. To do this, remove the seat cushion and seat
plate. Loosen the hook-and-loop connection of seat back and seat plate. The seat bottom can then be folded to
the front. To remove the cover, open the snap lock at the rear end of the battery case (Fig. 16).
Fig. 16: Battery case
Maintenance-free lead gel batteries can be used alternatively.
Note!
Before working on the batteries, read the warning instructions of the battery manufacturer!
The maintenance screws are now visible and freely accessible from above (Fig. 17).
Fig. 17: Maintenance screw connection
Unscrew the caps of the individual chambers using a large screwdriver. The fluid level can then be determined
with the metal gauges. If the fluid is below the mark, either water or acid must be refilled, depending on the
maintenance interval.
Note!
When checking the battery's fluid level, make sure that the B 500/B 500-S is standing on level
ground!
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