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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.
Even if a battery is not used, when it is stored over a long period of time, it will deteriorate 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 (fully
charged), pushing the indicator switch will always show all 5 lamps lit. Even if deteriora-
tion has progressed, all 5 lamps should turn on when fully charged. This display format
was adapted for this battery, as the rate of deterioration of lithium ion batteries is gradual.
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The life of the lithium ion battery
The life of the lithium ion battery (ESB1) is 8 years from its initial charging, or 8,000 Ah of integral
charge capacity.
• Battery life alert
The capacity indicator lamp starts alerting you
from 3 months prior to the battery becoming no
longer chargeable due to its end-of-life, or when
the integral charge capacity reaches 7,800 Ah.
When charging has completed and the charge plug
is unplugged, the capacity indicator lamp turns on
and off as shown in the figure on the right.
• When the battery reaches end of life
Once the battery reaches its end of life, the lamp
on the charger will not turn on when attempting to
charge the battery. Moreover, the battery’s capacity
indicator lamp no longer turns on and the batter
cannot be charged.
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