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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.
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.
(3) 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 lamps start alert-
ing you from 3 months prior to the bat-
tery becoming no longer chargeable
due to its end-of-life, or when the inte-
gral charge capacity reaches 7,800 Ah.
When charging has completed and the
charger plug is unplugged, the capacity
indicator lamps turn on and off as
shown in the figure on the right.
TIP
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.
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 dete-
rioration has progressed, all 5 lamps should turn on when fully charged. This dis-
play format was adopted for this battery, as the rate of deterioration of lithium ion
batteries is gradual.
• 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 lamps no longer turn on and the battery cannot be charged.
The capacity lamps
turn on and off repeat-
edly for 5 seconds,
in the order of the
arrows.
