Some more notes on caring for IMPRES batteries.

New batteries

New IMPRES batteries must be initialized/calibrated in an IMPRES charger. The charger will automatically detect the new battery and automatically start the initialization process. 

IMPRES chargers will automatically recalibrate or recondition IMPRES batteries periodically. Users should not bypass this process. 

IMPRES Vehicle Chargers cannot do calibration or reconditioning.

To comply with IATA safety regulations, Motorola Solutions ships new batteries at less than 30% state of charge. Therefore, new batteries must be charged within one month of receipt.

Improper maintenance and storage

IMPRES batteries which have not been properly maintained and then put into storage for a long time, may result in a flashing red indication when  put into an IMPRES single unit charger. The flashing red light on the charger indicates a fault condition. 

The recommended way to recover some of these batteries, is to put them in the charger for at least 12 hours. If the charger is still flashing red, remove the battery from the pocket for 5 seconds and put it back again for another 12 hours. 

The charger may be able to recover (fully charge and calibrate) some of the batteries successfully. If this doesn't work, the batteries were allowed to discharge too deeply to recover and are not useable. There is another way but I won't mention it here because its dangerous.

Further reading

I have written a number of posts covering this topic, click here for a complete list.