Battery Tender 12.5 ft DC Extension Cable, Black, Set of 4

If you've ever gone to plug in a Battery Tender and come up a couple feet short, this is the fix. This is a set of four 12.5-foot DC extension cables from Battery Tender, built to add reach between your charger's output and the battery you're maintaining. No moving the charger. No relocating the battery. Just more cable.

Here's the situation we see all the time. The charger lives on the garage wall or bolted inside a boat's console locker, and the battery sits across the bilge or down under a seat. The lead that came with the tender gets you close, but not quite there. One of these extensions bridges that gap with room to spare. At 12.5 feet each, you've got plenty of slack to route the cable cleanly along a stringer, up a firewall, or around the edge of an engine bay instead of stretching it tight across a walkway.

The reason you get four in the box is simple. Most of us aren't maintaining just one battery. A boat, a couple of motorcycles, the lawn tractor, maybe a classic in the corner that only comes out on nice weekends. If you run a Battery Tender on each one, you can leave an extension permanently rigged to every battery and just walk the charger over, or run a bank charger and fan the extensions out to each machine. Buying them as a set of four costs less than picking them up one at a time, and you'll use them.

These plug straight into the quick-disconnect harness that Battery Tender uses across its lineup. That means the Battery Tender Junior, the Plus, and the 2, 4, 5, and 10-Bank units all accept this cable without any adapters. The connector snaps together, seats with a positive click, and pulls apart just as fast when you're ready to move the charger to the next battery. That quick-connect design is the whole point of the Battery Tender system, and this extension keeps it intact instead of forcing you to splice in bare wire.

One thing to get right before you order. This cable is for 12-volt Battery Tender chargers with the standard quick-disconnect plug. It is not for use with the 6-volt Battery Tender Plus, and it won't work with any Battery Tender product that uses the white quick-disconnect plugs. Those white-plug units run a different connector, and this lead won't mate with them. If your charger is a 12-volt unit with the usual connector, you're good. If you're not sure, check the plug on your existing charger harness before you buy.

Installation is about as simple as it gets. Leave the ring-terminal harness or the alligator clips that came with your Battery Tender attached to the battery the way you always have. Then connect this extension between that harness and the charger's DC output. The extra 12.5 feet lives in the middle, so the ends you actually handle stay the same as before. Route the slack neatly, zip-tie it clear of anything hot or moving, and you're done.

Out on the water this earns its keep fast. Marine batteries end up in awkward spots, buried under a rear casting deck or tucked into a lazarette where the factory charger lead never reaches. Run one of these from a shore-power charging point and the battery stays topped off all season without you crawling around to reposition the tender every time. Same story in the garage with a bike whose battery hides behind a side cover, or a tractor parked at the back of the shed.

The cable jacket is black, so it disappears against most engine bays, transoms, and shop walls instead of standing out. And because it's genuine Battery Tender gear, it's sized to carry the maintenance current these chargers put out without heating up or dropping voltage over the run.

Bottom line, if your charger and your battery just aren't in the same neighborhood, this set of four extensions closes the distance. It's the kind of small piece you don't think about until you need it, and then you're glad you've got four.