Motorola PMNN4409 is an IMPRES high capacity 2250 mAh Li-Ion, submersible battery.
IMPRES batteries when used with an IMPRES charger provide automatic, adaptive reconditioning, end-of-life display, and other advanced features. Data is stored in the battery and communicated to the charger via a unique IMPRES communication protocol which is designed to maximize talk-time and optimize battery cycle life - all automatically. Automated maintenance and a six month extended capacity warranty when used with IMPRES chargers.