Had a couple of Auraglow PIR/nightlights. One had the LED blow (or so I surmised from the flash and then non functioning) and the other one had a battery leak destroy one of the terminals.
5 minutes work with a screwdriver (and these little things had *4* screws apiece ... 2 would have done) and a soldering iron, and the terminal from the blown one was soldered into the space on the corroded one, and it's back up in the hall.
+1 for DIY.
Especially with the nights drawing in, and power cuts becoming "a thing" again, it's handy to have a few around the place to come on if it's dark and there's movement. At least we can find the torches and lanterns without disaster.