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7.6. The Temperature of the Nickel Metal Hydride
Battery (JWB2) during Charging
Charge the battery in an environment with a temperature of 10 to 25°C (50 to 77°F).
• To protect the battery, if the internal temperature of the battery is under 0°C (32°F) or over 40°C (104
°F), charging does not start. Instead, it enters a standby mode. During this time, the charge lamp
(green) flashes.
While in standby mode, when the battery reaches an appropriate temperature, the charge lamp
will change from a flashing to an “on” state, and charging will start automatically. (The length of the
standby time varies with conditions.)
If you perform a refresh recharge when the internal temperature of the battery is under 0°C (32°F)
or over 40°C (104°F), it may enter a standby mode as it goes into normal charging after discharging
the remaining electricity.
• The battery temperature increases during charging. However, the charger will stop charging if the
battery temperature rises above 50°C (122°F), and the power for the charger will turn off.
Since charging has not ended, it is necessary to charge again after the battery temperature has
decreased.
Charging a battery immediately after travel, or charging a new battery is likely to cause its
temperature to increase, which increases the likelihood of the charger stopping charging before
completion.
• A cooling fan operates automatically if the charger temperature increases during charging.
While charging, do not block the intake and exhaust vents of the charger.