Battery Doctor 20138 Battery Disconnect Switch for Top Post Terminal, 12v Battery Kill Switch
Key features
- •Battery Doctor
- •The easy way to disconnect electrical power on any vehicle, without tools
- •Simply lift the knife; power is cut
- •Prevents shorts and fires when working on electrical systems; discourages theft; eliminates battery drain on idle batteries
Battery Doctor 20138 Battery Disconnect Switch for Top Post Terminal, 12v Battery Kill Switch
List Price: $46.95$42.26DEALYou Save: $4.69 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 22, 2026In Stock (30)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.1
out of 5
Based on 10 reviews
5★
60%
4★
10%
3★
30%
2★
0%
1★
0%
Mediocre Build Quality
mstrjon32•November 9, 2017
Bought this to alleviate battery drain on my very seldom used Saturn Sky. The length of the battery cables and the spacing around the battery on the Sky necessitated that I reverse the switch by unscrewing both sides and reattaching them in the opposite orientation. This is straightforward enough, but when reattaching the receiving side of the switch, I accidentally stripped the threading without using much force at all. I was able to salvage the switch using a tapered head nut and bolt, but overall I'm not too impressed with the build quality or design. If the threads had stripped on the side with the lever, I'm not sure there would have been enough room to fit a nut in place. If you need to reverse the orientation of this to fit your application, use care when reinstalling the screws.
Installed, it serves its purpose and is easy enough to operate. I had originally tried to fit a screw-type battery cut off but couldn't get the cable to turn and reach the post with that design.
Installed, it serves its purpose and is easy enough to operate. I had originally tried to fit a screw-type battery cut off but couldn't get the cable to turn and reach the post with that design.
Very Froderick Feankensteen
Mike•October 17, 2017
It's alive. IT'S ALIVE!!!!!!!!!
Added this to my battery on my plow truck to stop some unknown parasitic loss and it has worked well thus far. Only the frigid, winter months will tell. That'll be the true test. So far well worth the $20
Added this to my battery on my plow truck to stop some unknown parasitic loss and it has worked well thus far. Only the frigid, winter months will tell. That'll be the true test. So far well worth the $20
Batterydisconnect.
topgun•October 12, 2017
Fantastic. The hole where you clamp to your battery terminal is much to small to fit. Had to go to a garage having them expand the hole. Very difficult. I would suggest you purchase elsewhere!
Iffy cheap temporary solution to an expensive electrical problem
Jason Staats•May 30, 2017
I bought this to easily disconnect the battery while the vehicle sits for a few weeks unused because it recently developed a parasitic draw that had me coming back to a dead battery. Installation was straightforward yet somewhat tricky given the location of my battery. On the first use the plastic end piece fell off and I noticed quite a lot of flexing in the plastic that separates the terminals. You definitely need to use two hands open and close the contact. It works but I'm not sure how long it will last.
Visual confirmation of the disconnection.
UnityInDuality•May 20, 2017
Absolutely great. I tried the round disconnector and could not tell if I disconnected the battery. These make it easy and definitive. When you pull the knife switch open it is easy to see that the connection is open.
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