MPRES™ 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 maximise talk-time and optimise battery cycle life — all automatically. Automated maintenance and a 6-month extended capacity warranty when used with IMPRES chargers. PMNN4069 batteries meet Intrinsically Safe ratings (FM) when used with any MOTOTRBO portable radio