Thanks Obi Wan,
Concluded that MaxBatteryError doesn't quite fit the bill, so landed on custom reg scanning instead. Testing only on one device currently, but I've successfully injected the required info into the registry of the device, and added custom scanning within Lansweeper to pick it up. I can see said info in Lansweeper under Config > Scanned Info > Registry Keys, so we're all good there.
My only problem now is actually generating a report. I'm frankly useless when it comes to building SQL queries, would you be able to lend a hand?
I've tried to patch together a few from other community posts surrounding custom registry key/value reports, and they all 'run' successfully with no errors, but they'll never pick up the info I call for.
I attempted to use and amend the query from here: https://www.lansweeper.com/resources/report/operating-system/custom-registry-key-audit/
...and got nothing, amending the path and value as required.
Here are the paths and values I'm after:

Any ideas? Thanks in advance!