Pulse Chargers : Is this article right ?

Just came across this : Extending Battery Life, by D.P.

http://www.survivalblog.com/2012/07/extending-battery-life-by-dp.html
or here

My son brings home dead SLA batteries most of which are over 5 yr of industrial use/abuse & to date he has given me 15 of which I was able to recover 13 of them (with the CTEK) which I sell ($25) to people I know & some have been in use for over a year with no issues. This pulse technology de-sulphates SLA batts which to my understanding is responsible for over 80% of battery deaths. So yes, it works.

Keith