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8.3. Characteristics and Handling of the Lithium Ion
Battery (ESB1)
(1)
Ambient temperatures
Depending on the ambient temperature, the distance that can be traveled becomes shortened.
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In order to maximize the battery's performance, it is recommended that you use the battery under the
following conditions.
When in use on the wheelchair:
Temperature range between 0 to 35°C
When removed from wheelchair and stored:
Temperature range between 10 to 25°C
When charging:
Temperature range between 10 to 25°C
• Storing the battery in excessively high or low temperatures will
speed up its degradation, and its capacity will rapidly decrease.
• Using the wheelchair in excessively low temperatures will cause
the battery deterioration to speed up and its capacity to rapidly
decrease. For information on degradation, see "Battery's deterio-
ration characteristics" on the next page.
TIP
While traveling, if the internal temperature of the lithium ion battery becomes too high
or too low, a buzzer will notify you.
• When using a lithium ion battery, a buzzer will beep (continuous "Pi Pi Pi Pi") if the battery's
internal temperature drops to 0°C or below, or rises to 45°C or above for 5 seconds.
• When the buzzer beeps, promptly return to the environment within the recommended range
of operational temperatures, and use the battery there.
• When descending down a slope on the wheelchair, the drive motor, contrary to normal
operation, generates electricity and charges the battery. Charging a lithium ion battery
when its temperature is 0°C or below/45°C or above causes its deterioration to progress
extremely rapidly. For this reason, when you are descending down a slope in such
temperatures, the wheelchair may stop moving to protect the battery.
When this happens, you will hear 5 long beeps before the wheelchair stops, and then
another long beep 10 seconds later as the wheelchair stops.
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