I've used it to find good and bad batteries among the appliances and vehicles I have. Slightly subjective, but I found it heavier and more stable than me. to be expected in this price range. For about $20 I'm thrilled. Use it carefully when you need it, next time put it back in the box that came in your toolbox and it should look and work pretty much the same when your survivors rummage through your stuff. Probably none of me knows what he's doing, but that's not my problem. I expect 30-40 years from now someone will pay $5 for it at a flea market set up in a dead man's driveway. (mine) Instead of swapping out healthy batteries at fixed intervals like I used to, I can now actually tell when they're running low instead of throwing money away to be on the safe side. It has already paid off and will pay off in the future. I want to buy one sooner.
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