Compatible model: This high-quality BAT-40 replacement battery is compatible with IFWA-40 IFWA40 mobile hotspot router. Rechargeable battery, can be used multiple times. High-quality battery: BAT-40 replacement battery is made of high-quality materials, stable performance, high charging efficiency, and small self-discharge. Provide reliable, long-lasting power for your router. Safety: Each BAT-40 replacement battery is rigorously tested to ensure correct voltage, circuit protection, stable current, low self-discharge and guaranteed battery life. Multiple protection against overcharge, over discharge, over current and short circuit problems. Battery specifications: Battery type: lithium-ion battery, Capacity: 3000mAh/11.1Wh, Voltage: 3.7V, Weight: 59g, Size: 2.56 x 1.77 x 0.39inch, Color: White. Easy to install: The upgraded version of BAT-40 replacement battery, easy to install, the size of the same as the original battery, to provide a better backup battery for your router. After replacing the battery, reconnect the power supply and start the router. Effective replacement: BAT-40 replacement battery is fully matched with your router, which can effectively replace the original battery and provide a high-capacity backup battery for your router.