The Motorola PMNN4489A (also referred to as PMNN4489) is a high-capacity, intrinsically safe Lithium-Ion battery designed for heavy-duty, hazardous, and professional work environments. It is engineered specifically for Motorola MOTOTRBO portable radios.Chemistry: Lithium-Ion (Li-Ion)Capacity: 2900 mAhVoltage: 7.4 VAverage Battery Life: Up to 25–27 hours of continuous use (depending on radio model)IMPRESTM Technology: When paired with an IMPRES charger, it features automated adaptive reconditioning, tracks usage history, and maximizes the battery's overall lifecycle.IP68 Rating: Completely dust-tight and submersible in up to 1 to 2 meters of water for up to 2 hours.Intrinsic Safety (UL/TIA4950): Conforms to strict safety standards for safe operation in hazardous environments where explosive gases or dust may be present.