I've seen the supposed test from Faztech. These test aren't even close to being Scientific or according to BCI-I-2 or BCI-I-4. If a standard charger took 3 hours to recharge the battery, then the Faztech may have taken 8 hours. Their chargers are very low power and have little if any proven success anywhere in the US. They have no US parts distribution and service distribution. They use MOSFETS, which tend to have lots of issues in the industrial market place, burning up from transients and lightning strikes, which isn't unusual in a distribution center or manufacturing facility that is located in the outskirts of civilization.

Other US manufacturers have used Mosfets as well in their fast chargers and have had a lot of problems. IGBT's on the otherhand are well accepted in industrial applications, first used 40 years agoin lift trucks and overhead crains, and are very energy efficient and robust. IGBT's have efficiencies of 93% or better and Power Factors near unity.

EnerSys has 2500 plus chargers in 400+ customer applications. We monitor usage through ever evolving data capabilities which are already maturing at over 4 years of usage. Find a list of Faztech customers and you'll still have more than five fingers to count with. In my mind Faztech is Smoke and Mirrors, they definitely aren't fast charging.