Motorola IMPRES User Manual page 12

The IMPRES Adaptive Single-Unit Charger monitors the usage
pattern of the IMPRES battery, stores that information in the
IMPRES battery, and performs a recondition cycle only when
needed.
The IMPRES Adaptive Single-Unit Charger will not overheat the
IMPRES battery regardless of how long it is left in the pocket. The
charger monitors the battery and automatically "tops off" the
battery as required.
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