Hotspot that can run with battery removed

In theory, the Netgear Nighthawk M1 (MR1100) should satisfy your needs. Its manual states that it can be powered solely by its AC mains charger, without its battery installed. However, if you've had time to read some of the messages in this forum, you will have discovered that there are some issues with this theory.

First of all, the mains charger that up to now has been supplied with the M1 has a 2A output. This is fine for charging the battery but the M1 runs unreliably on only 2A without the battery installed. Users have established that a good-quality 2.4A mains charger is required to prevent the M1 from rebooting when under "pressure" (dual-band WiFi, long range WiFi setting, Ethernet port usage, etc.).

3rd-party websites indicate that the M1 incorporates the Qualcomm Quick Charge 2.0 chip, so it seems logical to purchase an upgraded mains charger that is compatible with this charging technology. While the use of non-standard mains chargers could affect your Netgear warranty, and bearing in mind that cheap, badly-designed chargers can damage the equipment they're connected to, I decided to purchase this Qualcomm Quick Charge 3.0 charger (backwards compatible with Qualcomm Quick Charge 2.0). And here's more detail about the problems and solutions. Prior to installing the new charger, my M1 rebooted many times each day. Now it runs for days without a reboot. There are no doubt many other reputable mains charger companies, so please do your own research before following my choice.

So having solved the reboot issue when running solely off an AC supply, the next problem is that if you are hoping to connect to the M1 via its Ethernet port, this currently goes to sleep after a period of inactivity to conserve battery power - the firmware/software doesn't take into account the fact that there is no need to sleep when connected to an AC supply. It is also switched off by default after the M1 reboots. To wake up the Ethernet port, it is necessary to either tap the power button once (Ethernet connection is re-established after a few seconds) or disconnect the Ethernet cable and reconnect it. Unfortunately, there are currently no settings in the GUI to allow this Ethernet port sleeping after inactivity or reboot to be switched off. There are plans to implement these options in a forthcoming firmware release due in Feb. according to this Netgear moderator.

The M1 auto-updates its firmware/software, probably downloading this from a hidden location on the Netgear website. It seems to me that the reason for Netgear not providing publicly-accessible firmware downloads for the M1 is that each carrier in a specific country has a customised version. I'm in the UK and my carrier is EE. My firmware update numbers appear to differ from say Telstra in Australia or AT&T in the States. It's therefore hard to know when the specific features referred to in posts on this site will appear in my version. However, here's a post from the same Netgear moderator indicating that the Ethernet port sleep functions have been improved in version 10.16.04.04 firmware, which I think is either a Telstra or an AT&T release. And in this post he claims that the Ethernet port remains active for a longer period of 2 mins after reboot.

My M1 is currently on firmware release NTG9X50C_10.22.03.00 (build date 22nd Nov 2017), which installed itself a couple of weeks ago. Prior to that update, the Ethernet port went to sleep a few times a day. Now it seems to stay awake. There are still no options in the GUI to allow the Ethernet sleep function after inactivity or reboot to be completely disabled when running solely on a mains charger. I hope that these options will be implemented early this year. However, if the firmware available in your area complies with that referred to in the above Netgear moderator's posts, the Ethernet port mode of operation should satisfy your needs.

If you intend to connect to the M1 via WiFi instead of its Ethernet port, there is already an option in the GUI to disable the WiFi sleep function so in that case, the M1 should be fine for you.

Personally, I'm now very happy with the M1 - it's essentially a very good and fast hotspot that wasn't primarily intended to be used for 24/7 internet access by an extensive home LAN, but this is what it's succeeding in doing in my case.

One of my failings is the length of my replies to requests for help but I hope this is of some use to you :smileywink:.