【Compatible Model】: This BAT-40 Replacement Battery Suitable for all for AT&T IFWA-40 IFWA40 Mobile Hotspot Battery. 【High Quality Assurance】:Our upgrade BAT-40 Replacement Battery has UL,CE and Rohs certification, uses Grade A+ rated battery cells. Every battery is manufactured and tested under strict quality control standards. Build-in microchip to prevent over-charging, over-discharging, short-circuit and over-heating. Multiple-protection for safer operation for both user and devices. 【Long Battery Life】: This upgraded BAT-40 high capacity replacement battery, Battery type: Lithium-ion, Battery Capacity: 3200mAh, Watt-hour: 11.84Wh, Voltage Output: 3.7V. Brand new 0 cycle,built to last up to 1200 charging cycles to provide longer battery life. bring your AT&T IFWA-40 IFWA40 Mobile Hotspot battery's life back to glory. 【Use Instructions】: Using up all the power of battery for the first three times before charging, and then take a full charge, thus the battery can be reached the optimum effect of using. Please remember that its full performance and longevity is only achieved after 8 to 10 complete charge and discharge cycles. 【After-sales Service】: If you are not satisfied with our product, please contact our friendly customer service through the "Contact Seller" feature, we will reach out to you within 24 hours, solve your problem quickly and efficiently. BAT-40 Battery, [2026 New Upgrade] 3200mAh Ultra High Capacity Replacement Battery for AT&T IFWA-40 IFWA40 Mobile Hotspot Lithium-ion Battery