What is the correct temperature range for charging the CMCE040 battery pack?
Only charge the battery pack when air temperature is above 40°F (4.5°C) and below 104°F (40°C). For longest life and best performance, charge the battery pack when the air temperature is between 65°F and 75°F (18°C–24°C). (Page 9)
From the official Craftsman CMCE040 Soldering Iron manual, page 9
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