Otto Bock B500 plus, Instructions For Use Manual, Page: 15 / 28

Ottobock | 15 B500 plus
Preparation for Use
Closing the battery tray (on models without drive wheel
suspension)
1) Place the cover on the battery tray.
2) Close the strap.
3) Replace the seat bottom and push it down tightly.
4) Press the seat cushion firmly on to the hook-and-loop
material on the seat surface.
5.2.4 Charging the battery
See the power wheelchair instructions for use (user) for all
information regarding the charging process.
5.2.4.1 Battery charging information
The range of the power wheelchair is determined by the bat­
tery capacity. The battery capacity is influenced by many
factors. In addition to the temperature, battery age and driv­
ing conditions, the charging cycle also has a pronounced
effect on the capacity and therefore on the range.
Batteries reach their full capacity only after
20 - 30 charge
cycles. Only if the full capacity of the batteries has been
reached can the power wheelchair achieve the stated range.
At temperatures of
< 0 °C/32 °F
the battery capacity drops
by up to 35% in relation to the capacity for an outside tem­
perature of 20 °C/68 °F . This shortens the range of the
power wheelchair accordingly. Moreover the charge level
displayed on the control panel can differ more significantly
from the actual battery capacity.
The following information should be observed for an optimal
charging cycle:
• The batteries can be charged at any time, regardless of
the remaining battery capacity.
• It takes about
10 hours
until a discharged battery (only
1 flashing segment) is completely charged. When the
charging process is complete, the battery charger can
remain connected to the power wheelchair with no risk
of overcharging or damaging the battery. The battery
charger features a programmed recharging phase that
will maintain the battery capacity at the level that has
been reached.
• If the power wheelchair is used every day, the battery
should be charged every night.
• Never discharge the batteries completely (deep dis­
charge).
• The batteries will gradually discharge if the wheelchair
is not used for extended periods of time. If the power
wheelchair is not used for an extended period, the bat­
teries should be charged
1 x per week to maintain their
capacity.
• The fuse should be removed if the wheelchair is not
used for more than 3 days.
• The power wheelchair control unit must be switched off
while the batteries are charging to allow all of the char­
ging current to be fed into the battery.