Replacement High Capacity Battery for the GPSMAP 276, 276C, 296, 376, 376C, 378, 396, 478, 495, and 496 Handheld Outdoor GPS. The 3450 mAh capacity rating is 57% higher the original 010-10517-00, 011-00955-00, 011-00955-02, and 011-00955-03 battery packs, translating to longer battery life per charge AND more total charge cycles for the lifespan of the battery pack. Made with premium Japanese power cells and manufactured in Taiwan.