Replacement battery for Isatphone 2. Specifications: 3000mAh, 3.7V, Li-ion. Compatible with: Isatphone 2. Replaces: Inmarsat SAS2, Inmarsat 136081, Inmarsat VKB 56426 702 098, Inmarsat VKB 56426 702 097. Inmarsat replacement battery designed for Satellite Phone devices. A direct drop-in replacement for the original battery.