I use the unit for a quick-test of my battery packs. By removing the speakers, the alarm signal can be used to cut off the battery by adding a few more components to prevent deep discharge damage to the connected battery pack.
Pros: does exactly what it needs to do for a very cheap price. I can build this myself but not for this cost! Cons: the accuracy is not as good as a multimeter but it is good enough for the usage you will have from it
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