12 volt passenger car & marine deep cycle application…
Do they work?
Thx
Good Question.
I recently bought a CTEK MXS 5.0, after some research.
It charges batteries, but did not revive a flat 2year old motorbike battery that was at close to 0 volts.
I have seen them prolong a weak batteries life by a month or two, but that’s about it. Not really worth it, unless you already own the charger.