I was doing maintenance on my home network and had all wifi access points down for 4-5 hours. My SCK kit was plugged into power the entire time. Interestingly, once it lost wifi connection, it started running down the battery (even though it was plugged in).
Weirdly, I did not realize it since it reconnected once network maintenance was done, and resumed data reporting. But for some reason, it continued running on battery until it died a few days later. The only thing that told me this was a battery low alert I got which prompted me to look, but by the time I got home it was dead. I had to unplug/replug it to force a reboot and now it appears the battery is slowly charging again.
Any idea why this happened, and how to prevent it? If this had been a remote sensor without easy access, I would have been screwed.