Dymo LabelManager Wireless PnP User Manual page 25

When Discharging the Battery Pack
To reduce the risks associated with fire and explosion, which if not
avoided, could result in serious injury or death and/or property
damage:
Danger

Use the battery pack only in the specified equipment.

Do not discharge the battery pack close to fire or at extremely high
temperatures over 60°C (140°F), for example, a vehicle, strong direct
sunlight.
To reduce the risks associated with various hazards, which if not
avoided, may result in minor or moderate injury and/or property
damage:
Caution

Battery pack can only be used within a temperature rage of -
20°C~60°C (-4°F~140°F).
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25 LabelManager Wireless PnP
User Guide