Motorola PMNN4809A IMPRES™ Li-Ion, 2850mAh, IP68, Battery 

The Motorola PMNN4809A R7 battery is equipped with our IMPRES Self Calibration feature which allows you to quickly charge the battery without long hours of calibration or reconditioning every month.  The Motorola PMNN4809A IMPRES Self Calibration feature functions when the battery is charged and maintained with the IMPRES Single Unit Charger and IMPRES 2 Multi Unit Charger (with SW ver V2.01 and above) listed in radio's Authorized Accessories List. This IMPRES Li-Ion, 3200mAh battery is designed to maximize talk time and optimize the battery life cycle (up to 43% longer than standard battery) with our trusted IMPRES chargers.