Can I use boost module to replace 9v battery with Li-Ion?

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Pregulla
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Can I use boost module to replace 9v battery with Li-Ion?

I was thinking about powering my multimeter by Li-Ion battery using a boost module like this
Are there any problems in doing so?

dave_
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Well, if you just plug it where the 9V battery was, it will run all the time, draining your battery quite quickly.
You would have to find a way to turn the converter on and off with the multimeter.
Besides that, I’m not sure how your meter will like switching noise where it expects a nice, clean battery.
That might cause some problems, depending on the actual meter.
In the end, it might not be a very practical approach.