LG T280 User Manual page 39

For more efficient use of the battery, read the following carefully.
The battery capacity may change due to chemical reactions during charge and discharge.
40 Using the system
■ Natural discharge: The battery runs low naturally even if it is kept unused.
■ Periodical full (dis)charge: Repeated recharge in midway shortens the running time
gradually. To lengthen the span, charge and discharge the battery to the fullest once
or twice. For optimal use, execute the full charge/discharge every 30 to 60 days. Still
better, recharge the battery after it has run out.
■ The system checks the charge status of LG batteries frequently, and then calculates
and indicates the actual battery duration on the current system setup.
■ The battery is wearable goods and thus the life span may be getting shorter as used.
The battery running time may also become shorter accordingly.
■ When the battery is fully charged the machine stops recharging, and it resumes
recharging when the battery charge rate drops below 95 %.
■ When the temperature of the battery drops below 9.6, it is charged in a low current.
In this case, charging time may stretched to 32 hours or longer.