I-River IBP-200 battery by Amstron is designed for use with PMP-100, PMP-120 (20GB), PMP-14 (40GB). The Amstron GPIR-02 is designed to replace OEM battery part number IBP-200. Amstron Portable Media Player batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. • Chemistry: Li-Ion • Ratings: 3.7V 2400mAh • Dimensions (LxWxH): 3.31'' x 1.11'' x 0.90'' • Warranty: 1 Year * Warranty covers any manufacture defect. Warranty does not cover damages due to misuse of the battery nor diminishing run time due to normal wear and tear.