decon E-Drive PLUS User Manual page 77

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 recom-
mended 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 dete-
rioration 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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(2) Battery's deterioration characteristics
All batteries are consumables. A battery gradually deteriorates and its capacity decreases
over time and with use.
The extent to which the capacity decreases by deterioration depends on the use conditions.
TIP For a lithium ion battery, its capacity will decrease to approximately 60% of that of
a new battery after 700 charge cycles, under normal use.
Even if a battery is not used, when it is stored over a long period of time, it will deterio-
rate and its capacity will decrease.
When you are using multiple batteries, alternate between the batteries.
Immediately after the lithium ion battery has successfully completed charging
TIP
(fully charged), pushing the indicator switch will always show all 5 lamps lit. Even if
deterioration has progressed, all 5 lamps should turn on when fully charged. This
display format was adopted for this battery, as the rate of deterioration of lithium
ion batteries is gradual.
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