Instrinsically Safe Li-Ion replacement Motorola JMNN4024 battery provided by AtBatt.com is designed for use with the EX500, EX600, GL2000, GP328 Plus, GP344, GP388, GP644, GP688 two-way models. The 2W-EX4024 is designed to replace OEM part numbers: JMNN4024 and JMNN4024R. AtBatt.com two-way batteries are precision-engineered and rigorously tested to ensure compatibility. • Chemistry: Instrinsically Safe Li-Ion • Voltage: 7.2V • Capacity: 1700mAh • Warranty: 1 Year