Aeon support just got back with me, told me to update firmware to 3.67 which I have attached.
I am assuming that you have a US HEM G1, if it is running an earlier firmware version, then it will give you a low battery alarm. You can update the firmware to V3.67 to solve this issue.Plug your HEM G1 into your Windows PC, then change the .ex_ extension to .exe in order to run it. Update the firmware, and it should indicate when it is complete, then you can close it.
After updating, i suggest that you re-include it back into your 2gig panel.
I have the 1E version or the first gen of the US 2 Phase 200 Amp meter, so this file is for that version only. Contact aeon support if you need another file as the versions on their site are a bit older.
So far so good, when it re-included it did not trigger the low battery, I will update here in a day or two if it worked or not.
Just as a heads up, removing a power meter and adding it back in removes all history on alarm.com the history on the panel stays though.