Replacement battery fits 28 Huawei compatible models. Specifications: 1500 mAh, 3.7V, Li-ion. Compatible with: T-Mobile E582, T-Mobile Pulse, T-Mobile Walk Box mobile WLAN, E-Mobile D25HW, E-Mobile Pocket WiFi, SoftBank C01HW and 22 more compatible models. Replaces: 4G System LB1500-03. Huawei replacement battery designed for Wireless Router devices. Tested for reliability and long service life.