Precautions for Panasonic Toughbook cf 31 battery pack

original PANASONIC Toughbook CF-31 10.8V 6750mAh laptop battery

The panasonic toughbook cf 31 battery pack may become warm during recharging or normal use. This is completely normal.
Recharging will not commence if internal temperature of the panasonic battery pack is outside of the allowable temperature range (0°C to 50 °C {32°F to 122 °F}). Once the allowable range requirement is satisfied, charging begins automatically. Note that the recharging time varies based on the usage conditions. (Recharging takes longer than usual when the temperature is
10 °C {50 °F} or below.
If the temperature is low, the operating time is shortened.Only use the computer within the allowable temperature range.
This computer has a high temperature mode function that prevents the degradation of the battery in high temperature environments. A level corresponding to a 100% charge for high temperature mode is approximately equivalent to an 80% charge level for normal temperature mode.
The battery pack is a consumable item. If the amount of time the computer can be run by using a particular battery pack becomes dramatically shorter and repeated recharging does not restore its performance, the battery pack should be replaced with a new one.
When transporting a spare battery inside a package, briefcase, etc., it is recommended that it be placed in a plastic bag so that its contacts are protected.
Always power off the computer when it is not in use. Leaving the computer on when the AC adapter is not connected will exhaust the remaining battery capacity.