NETGEAR Nighthawk M6 Mobile Hotspot Add-On Battery – Works with M6 (MR6150, MR6550) Mobile Routers
A compact, rechargeable 5185mAh lithium-ion backup battery made for the NETGEAR Nighthawk M6 mobile hotspot (MR6150, MR6550). Buyers generally report smooth replacement performance, including the ability to swap without long interruptions, but battery runtime can vary by use (especially heavier 5G/roaming scenarios).