Shimano EP801 User Manual page 6

Important safety information
Do not use the battery if it has any noticeable scratches or other external damage.
If this is not observed, bursting, overheating or problems with operation may occur.
Do not use the battery if leakages, discoloration, deformation, or any other abnormalities occur.
If this is not observed, bursting, overheating or problems with operation may occur.
Do not use the battery outside its operating temperature ranges.
If a battery is used or stored in temperatures which are outside these ranges, fire, injury or problems with
operation may occur. The operating temperature ranges are given below:
(1) During discharge: -10 - 50°C
(2) During charging: 0 - 40°C
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