I'm dubious. The whole point of Batteriser is to extend life. Why not just switch two flashlights on and see how long they last?
Because this isn't really a good test either.
No, but it's simple, it's logical, and if the flashlights have internal boosters then it's not a
terrible test.
And, I'll ask again for everyone to lay off Wayne. Wayne is a victim, not a bad actor. He depended on Bros. Roohparvar to correctly represent their product and what's actually been sent to him, which clearly is not a production unit.
I agree that Bob is probably using him, just like the electronics guy in the monkey videos.
OTOH: Somebody who's nick is "revivebatteries" and who runs a business based around batteries ought to know a dead AA battery when he sees one.
If he measured 0.89V on a battery without remarking "It's dead, Jim!" then...
Edit: He also calls respected people "complete tossers" with abandon. This reduces the sympathy for him if he's fallen for Bob's lies and is now trying to dig himself out of a hole by trying to show they work as advertised (so he can sell them to other people).