Yamaha NAVIGO, Owner'S Manual

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9
9.3. Characteristics and Handling of the Lithium Ion Bat-
tery (ESB1)
(1) Ambient temperatures
Depending on the ambient temperature, the distance that can be traveled becomes shortened.
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 32 to 95°F (0 to
35°C)
When removed from wheelchair and stored:
Temperature range between 50 to 77°F
(10 to 25°C)
When charging:
Temperature range between 50 to 77°F
(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.
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 32°F (0°C) or below, or rises to 113°F (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 op-
eration, generates electricity and charges the battery. Charging a lithium ion battery when
its temperature is 32°F (0°C) or below/113°F (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 an -
other long beep 10 seconds later as the wheelchair stops.
TIP