🔧 Disconnect to Reconnect: Your Battery's Best Friend!
The WirthCo Battery Doctor 20138 is a top-notch battery disconnect knife switch designed for 12V systems. This universal fit solution is perfect for negative post terminals, ensuring your car battery stays charged and ready to go. Proudly made in the USA, it combines durability with ease of installation, making it an essential accessory for any vehicle owner looking to save on battery costs.
| Operation Mode | Off |
| Current Rating | 250 Amps |
| Operating Voltage | 12 Volts |
| Contact Type | Normally Closed |
| Connector Type | Clamp |
| Brand | Battery Doctor |
| Item Dimensions LxWxH | 0.41 x 0.41 x 0.16 inches |
| Contact Material | Nickel |
| International Protection Rating | IP00 |
| Number of Positions | 1 |
| Upper Temperature Rating | 100 Degrees Celsius |
| Connectivity Protocol | X-10 |
| Unit Count | 1.0 Count |
| Number of Items | 1 |
| Manufacturer | Battery Doctor |
| Model | 20138 |
| Item Weight | 9.9 ounces |
| Product Dimensions | 0.41 x 0.41 x 0.16 inches |
| Country of Origin | USA |
| Item model number | 20138 |
| Is Discontinued By Manufacturer | Yes |
| Exterior | Machined |
| Manufacturer Part Number | 20138 |
| OEM Part Number | 20138 |
| Mirror Lighting Type | LED |
A**R
Exactly as described
Great price, easy YouTube videos on how to install and works as advertised.
S**P
Excellent battery isolator
After reading the negative reviews I was skeptical about the quality (without a reason to be). Well made and does the job perfectly. I believe a lot of the negative comments are from people not holding the isolator tightly when installing and allowing the plastic bottom insulator to take the tightening torque and then breaking. You MUST HOLD THE ISOLATOR TIGHTLY IN YOUR HAND WHEN APPLYING TORQUE TO THE POST CLAMP AND THE ISOLATED POST, NO EXCEPTIONS.The other issue I read was the post clamp broke. Mine didn't, in fact the opening was sized correctly for the NEGATIVE POST AND THE ISOLATOR SHOULD ONLY BE INSTALLED ON THE NEGATIVE BATTERY TERMINAL, NEVER THE POSITIVE.No exceptions to that. You always break the negative side of the battery, NEVER the positive side because breaking the positive side will produce a spark and can cause the battery to explode if it's gassing off which it will do when charging or discharging.Far as I'm concerned the Isolator switch is a quality made component. I see no detractions in quality and if you follow my instructions, the install will be without issues.
N**X
Good
Perfect
R**.
A nice switch. I installed it on my yard truck ...
A nice switch. I installed it on my yard truck that never goes out on the road and does plenty of sitting during the year especially the summer. This should save the battery. Seems to be made well. I coated the whole thing with dielectric grease to prevent any corrosion. Was a breeze to install. Plenty of hood clearance with this model as it opens horizontally. Installed on a 1972 Ford F-250 4x4.
V**.
I have half s dozen
Great product price service.
Trustpilot
1 week ago
2 months ago