User Manual

17
3.4 Operating under special climatic conditions
The system is tested and approved for use within a working temperature range from -30°C up to +55°C.
Exceptions apply to batteries and charging devices.
Rechargeable batteries
Very low or very high temperatures affect the life of rechargeable batteries.
Rechargeable batteries may only be used in the temperature range from 0°C to +50°C. At temperatures
below 0°C we recommend the use of alkaline batteries.
As CT-DECT devices (PP) are used close to the body, temperatures below 0°C are rarely seen.
However, the CT-DECT Case stands (is suspended) in open air; therefore we recommend at very low
temperatures the use alkaline batteries instead of rechargeable ones.
Mobile (plug-type) battery charger
Working temperature range: 0°C – 25°