If you are into boat tuning then this is for you. They are cheaper and better than the most common alternatives. I am using these for an isolated battery installation with multiple batteries. Just note that many of the "SAE" forks sold are not exactly the same size. highlighted.
CARKU Pro-10 black/red
91 Review
Charger Vympel 57 black
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Efficient Charging With LST 7 Stages 5A Battery Charger - 3.3A 12V For Ultimate Performance
35 Review
Mroinge Automatic 6V/12V Trickle Charger For Vehicles, Motorcycles, Boats And More - Maintain Your Batteries With Ease!
29 Review