TechniSat DIGITRADIO 10 C Instruction Manual page 90

Only replace batteries with the correct type of batteries and the correct model
number
Caution! Do not expose batteries to extreme conditions.
Do not place on radiators, do not expose to direct sunlight!
Leaking or damaged batteries can irritate the skin. Use suitable protective
gloves. Clean the battery compartment with a dry cloth.
If the device is not being used for a prolonged period, remove the batteries.
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