because it is a battery device and dont want to place them on the asset data base
Who
are these people?
I have always taken the completely opposite stance:- "Everything goes on the Asset Register (equipment dependency database) unless there is some reason not to include it".
Similarly, in general "everything should be PM'd" (especially if you're a contractor) ... the only question being "when?" (or "how often?"). Such questions may be addressed by Risk Levels, which in turn point to PM frequency (which can range from days, to years, to never).
Even the cheapest, low quality junk can still be given the "once over" (quick examination) when the tech visits; in such cases the "immediate action" upon perceived defects or failures can then be:- "remove from service" (
aka, bin it)!