FLIR ThermaCAM P20 Operator's Manual page 70

10.3 – Battery safety warnings
Do not continue charging the battery if it does not recharge within the specified
■
charging time. Doing so may cause the battery to become hot, explode, or ignite.
The temperature range over which the battery can be charged is 0–+45 °C
■
(+32–+113 °F). Charging the battery at temperatures outside of this range may
cause the battery to become hot or to break. Charging the battery outside of
this temperature range may also harm the performance of the battery or reduce
the battery's life expectancy.
Do not discharge the battery using any device except for the specified device.
■
When the battery is used in devices aside from the specified device it may
damage the performance of the battery or reduce its life expectancy, and if the
device causes an abnormal current to flow, it may cause the battery to become
hot, explode, or ignite and cause serious injury.
The temperature range over which the battery can be discharged is -15–+45 °C
■
(+18.8–+113 °F). Use of the battery outside of this temperature range may
damage the performance of the battery or may reduce its life expectancy.
58
Publ. No. 1 557 536 Rev. a35 – ENGLISH (EN) – January 20, 2004