zaldog, I know not of the Dytek unit you're considering, but I'll say this: Batteries lead a harsh life. I haven't much first-hand experience with marine batteries or batteries in a marine environment, but, thinking on it, I suspect they lead the harshest of harsh lives. My feeling is: If the difference between a truly good
battery charger and a so-so unit is only $60 or so, over the life of the unit, it's money well spent. You want those batteries to work, and work well, when you turn that key or your instruments are running off them while under sail, etc.
FWIW: The PO of our new-to-us boat installed a
Statpower Truecharge 10TB.
Jim