Datalogic Skorpio X3 User Manual page 23

BATTERIES AND MAINTENANCE
Even if the storage temperature range is wider, in order to achieve
the longest battery life, store the terminal and the spare batteries
between 20 to 30º C (68 to 86º F).
Skorpio X3 (including spare battery) should be charged at an
NOTE
ambient temperature between 0 - 35º C to achieve the maximum
charging rate. Never charge the main device or spare batteries in a
closed space where excessive heat can build up.
The battery level may display incorrectly for several minutes after the
Skorpio X3 is disconnected from its charger if the charging cycle is
not completed.
NOTE
The Skorpio X3 may get warm during charging; this is normal and
does not mean a malfunction.
NOTE
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