Replacement 40115125.00 Extended Battery for AT&T MiFi Liberate 4G Mobile Hotspot High Quality, high capacity, light weight rechargeable battery, Overcharge protection, with built-in battery life microchip No memory effect. Can be charged or discharged as needed without loss of capacity Physical Dimension: 70.98 x 19.75 x 19.75mm Compatible Models: AT&T MiFi Liberate 4G Mobile Hotspot MIFI5792 Compatible Original Battery Part No: 1ICR19/6625018881 R1, 40115125.00