Cut the cord.
Keep the charge.
VoltWatcher physically opens the one cable every parasitic drain travels through — so your car starts tomorrow, without you ever finding the gremlin.
The remote battery disconnect
One button. The drain is locked out.
Clamp it on once. Press off when you park and the whole car goes to a true open circuit — the overnight drain hits zero. Press on before you drive. That's it.
- No wiring — clamps on in 5 minutes
- Live voltage readout so you can see it holding
- Auto-cutoff at 11.8V as a safety backstop
Sound familiar?
If you're nodding at any of these, you're in the right place.
You don't need to find the drain. You need to lock it out.
The whole idea, in one line
Every drain travels one cable.
Open it, and they all hit zero.
Known fault or a gremlin nobody can reproduce — it doesn't matter. A true open circuit stops all of it at once. You cut the path instead of hunting the source.
4.7 / 5 from 3,214 verified buyers
“Voltage held at 12.6 for two weeks parked. I'm not crazy after all.”
“I was unhooking the terminal with a wrench every night. Now it's one button.”
“It won't find the draw — and it doesn't need to. The overnight drain is just gone.”
Go deeper
Everything you want to know before you buy.
Our Story
Why we built a switch instead of one more diagnostic tool that never finds it.
Read the storyHow it works
The clamp-on, park-and-cut mechanism — and the honest limits we won't hide.
See the mechanismFAQs
“Isn't this just the wrench I already use?” and every other fair question, answered straight.
Get answersStop hunting the ghost.
Lock it out instead.
Clamp it on, press off when you park, and turn the key with confidence tomorrow.
Get VoltWatcher