NETGEAR AirCard Mobile Hotspot Lithium Ion Replacement Battery

All-day mobile Wi-Fi. The Nighthawk lithium-ion battery (5040mAh) works with the Nighthawk M1 Mobile Router (MR1100). Rechargeable and compact to take on the go, you can use and share your mobile router with up to 20 Wi-Fi devices all day for up to 11 hours.