I for one, think the Batteriser is great and all it is claimed to be, and have bought a container load.
I tried the battery charging methods in this video
and it worked great, so I believe the Batteriser people too.
Remember: "It's called electrical tape because it conducts electricity".
PS: All of the above is a load of crap, in case it wasn't obvious.
So many flaws and specious arguments I can't even start addressing them all. I can't wait until someone sends Dave some of them to test.