Honda E Manual page 575

uuCharginguHigh Voltage Battery
High Voltage Battery
The High Voltage battery gradually discharges even if the vehicle is not in use. As a
result, if your vehicle is parked for an extended period of time, the battery level may
get low. Keeping your vehicle's battery level low can shorten the battery life,
negatively affecting the vehicle's range. To maintain the battery while the vehicle is
not in use, recharge the battery at least once every three months.
The High Voltage battery life can also be affected by ambient temperature. In
particular, when it is cold outside, the vehicle's driving range can be reduced, and a
longer battery charging time is required. In addition, parking in extremely hot or cold
environments can accelerate battery drain.
To help extend the lifespan of the battery, it is recommended that you fully charge
the battery each time prior to driving.
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Battery Warming System
Designed to prevent the temperature of the battery from dropping when outside
temperatures drop, thereby maintaining starting and running efficiency.
When outside temperatures are low, the battery warming system will use the power
from the charging equipment to maintain the temperature of the battery until the
next time the vehicle is driven.
574
1High Voltage Battery
The High Voltage battery drains over time, and under
some conditions, drains faster. When the battery life
is shortened, this changes the vehicle's driving
distance.
1Battery Warming System
If the temperature of the High Voltage battery drops
to -30°C or below, the power system will not start.
Wait for the High Voltage battery to warm up or
move the vehicle to a warmer location. Note using
the battery heating system will not help in this case.