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Sold by: Ampper Direct
Sold by: Ampper Direct
(10464 ratings)
100% positive over last 12 months
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Ampper Top Post Knife Blade Master Switch, 12V / 24V Battery Disconnect Switch Isolator Power Cut Off for Marine Car Boat RV ATV (Negative, Vertical)

4.5 4.5 out of 5 stars 2,299 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Battery Switches by Ampper

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Negative (Vertical)

Purchase options and add-ons

Switch Type
Kill Switch
Material
Brass

About this item

  • Compatible: used for top post terminal, 15-17 mm cone / tapering battery NEGATIVE post only, DC 12V-24V system, 200A continuous and 600A momentary at DC 12V, on/off 2 position.
  • Convenience: vertical knife blade type, easy to install & simple to use. Lift the knife, then power will cut.
  • Heavy Duty: solid brass made, rust and corrosion resistant, durable made for safety use.
  • Purpose: used for battery to isolate and secure the electrical system, eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely.
  • Used for Car, Vehicle, RV and Boat batteries which have a standard 15-17 mm cone top post terminal, also used for electrical equipment.

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2.76 x 3.74 x 2.95 inches; 8.82 ounces
  • Date First Available ‏ : ‎ December 18, 2016
  • Manufacturer ‏ : ‎ Ampper
  • ASIN ‏ : ‎ B07JZ9NDH2
  • Customer Reviews:
    4.5 4.5 out of 5 stars 2,299 ratings

Product Description

Ampper top post knife blade battery disconnect master switch for Marine Car Boat RV ATV Vehicles (Vertical)

Specifications:
1, Used for top post terminal, 15-17 mm cone battery NEGATIVE post only.
1, On/Off 2 position.
2, Voltage: DC 12V-24V, 200A continuous and 600A momentary at DC 12V.
3, Easy to install & simple to use.
4, Knife blade type, lift the knife, then power will cut.
5, Solid brass made, rust and corrosion resistant, durable made for safety use.
6, Can stand alone or be locked together with other switch.
7, Used for battery to isolate and secure the electrical system, eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely.
8, Used for Car, Vehicle, RV and Boat, also electrical equipment's switch.
9, Package size: 3.9" x 2.75" x 2.75".

Complete kits includes:
1 x battery switch
1 x nut and bolt

100% Satisfaction.
No reason for return or change.

Order it now!

Important information

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From the manufacturer

Ampper Top Post Knife Blade Battery Switch
Ampper Top Post Knife Blade Battery Switch

Ampper Top Post Knife Blade Battery Switch
Manufactured by Ampper

Designed for 12V System

  • Car battery disconnect switch
  • Boat battery disconnect switch
  • Truck battery disconnect switch
  • RV battery disconnect switch
  • Other electrical equipment's Switch

Ampper Top Post Knife Blade Battery Switch

Ampper Top Post Knife Blade Battery Switch is used for battery to isolate and secure the electrical system, eliminate any power drain from the battery when vehicle or boat are not in use, disconnect the battery safely.

  • For top post terminal, 15-17 mm cone battery negative post only
  • Easy Installation with knife blade type
  • Simple to use : Lift the knife, then power will be cut off.
  • Solid brass made, rust and corrosion resistant, durable made for safety use.
  • Ideal for car, truck, boat or RV battery,also other electrical equipment's switch
  • DC 12V System,rated current: 200A

Product Details&Highlights

Ampper Top Post Knife Blade Battery Switch

Ampper Top Post Knife Blade Battery Switch

battery switch

Heavy Duty & High Quality

Solid brass made, rust and corrosion resistant

Easy Installation

Lift the knife, power is cut, Put down the knife, power is connected

Product Specifications

Ideal for car, truck, boat or RV battery

Ampper Top Post Knife Blade Battery Switch

Ampper Top Post Knife Blade Battery Switch

Ampper Top Post Knife Blade Battery Switch is used for battery to isolate and secure the electrical system, eliminate any power drain from the battery when vehicle or boat are not in use, disconnect the battery safely.

Knife blade type, easy to install & simple to use. Lift the knife, then power will be cut off.

Ampper Top Post Knife Blade Battery Switch

Ampper Top Post Knife Blade Battery Switch

For Top Post Batteries. Recommended To Mount On Negative Battery Post To Disconnect Ground Battery, very easy to install. Ideal for car, truck, boat or RV battery,also other electrical equipment's Battery.

Looking for specific info?

Customer reviews

4.5 out of 5 stars
4.5 out of 5
2,299 global ratings

Customers say

Customers like the value, ease of installation, battery life and performance of the electronic switch. They mention that its good value for the cost, keeps the RV battery from draining and that it extends the battery life. They are also satisfied with performance. That said, some complain about the size. Opinions are mixed on quality.

AI-generated from the text of customer reviews

119 customers mention107 positive12 negative

Customers like the performance of the electronic switch. For example, they mention it works great, runs fine, and is functional. Some say it's a well-executed version of a very standard product.

"...It fit just fine and works like a champ. Glad I bought it" Read more

"It is a well-executed version of a very standard product...." Read more

"...Works well" Read more

"Works great" Read more

115 customers mention109 positive6 negative

Customers find the installation of the electronic switch to be easy. They mention that it is very easy to install and use, and that it makes it as easy as a flip of a switch. Some mention that the installation process is much easier than removing the cable every time.

"Simple and easy. Does what it’s designed for" Read more

"Super easy installation. Was concerned about the reviews about the inside diameter being too small. It fit just fine and works like a champ...." Read more

"...This makes it much easier then removing the cable every time...." Read more

"...You want this. No installation required, per se. No drilling, no screws. Just disconnect you battery terminal...." Read more

42 customers mention38 positive4 negative

Customers like the battery life of the electronic switch. They mention that it prevents the RV battery from draining during storage, and it solves the problem of dead batteries. They also expect that it will extend the battery's life and saves them money.

"...I installed one of these knife switches and it saves the wear on the battery, and has no ill effect on the vehicles regular performance...." Read more

"...This shut off is so simple. When I first saw it, I couldn't imagine why anyone would use anything else...." Read more

"...I expect this will also extend the battery life, saving much more than the price of the switch...." Read more

"Great for easy battery disconnect." Read more

33 customers mention33 positive0 negative

Customers appreciate the value of the electronic switch. They mention that it is good value for the cost, money well spent, and a great buy. Some say that it's good value to store ATVs or seasonal vehicles.

"Kept having battery drain until I installed this. Good value." Read more

"This is a really great value. It has a bolt on the pivot, not a rivet. The plastic is sturdy, and the blade isn't flimsy...." Read more

"...That said it was inexpensive and I only plan to use it when we put the car into storage for the winter and pull it out the next summer, so it is..." Read more

"...To me, money well spent! I am happy! :-)" Read more

10 customers mention10 positive0 negative

Customers are satisfied with the delivery of the electronic switch. They mention that it works well, saves time, and is a great product.

"The shipping and condition of product was excellent." Read more

"...I surfed Amazon website and found this amazing product that saves me time and money." Read more

"great product and shipping, and good price" Read more

"...It was extremely easy to install and works as advertised. Awesome and quick, open the hood, turn it on or off and be on your way with your..." Read more

94 customers mention49 positive45 negative

Customers are mixed about the quality of the electronic switch. Some mention it's well made, dependable, and perfect, while others say it' s flimsy, may break with frequent use, and broke while installing. That said, most are satisfied with the functionality and design of the product.

"Very nice robust design in that can not only handle the power, but can reconfigure as needed using the screws and profile of the base." Read more

"...pivot point of the blade - it is a rivet and is small and may break with frequent use." Read more

"...Installed both within minutes. Great quality and simple to install. And did I mention fast shipping? Love it.Thanks,Jim" Read more

"...Otherwise, aside from the cheap materials it is made with, it does seem to be fairly well made...." Read more

47 customers mention13 positive34 negative

Customers have issues with the size of the electronic switch. They mention that it is a little too small for their battery post, and just barely fits. Some customers also mention that the blade is small and may break with frequent use. The switch is large, so it may not fit on some vehicles.

"...My concern is for the pivot point of the blade - it is a rivet and is small and may break with frequent use." Read more

"It is rather big." Read more

"...It fit just fine and works like a champ. Glad I bought it" Read more

"...It's pretty large, but it's made to accommodate a lot of amps, so you want large, heavy, copper. You want this. No installation required, per se...." Read more

12 customers mention3 positive9 negative

Customers are dissatisfied with the appearance of the electronic switch. They mention that it is not real copper, it has been spray-painted to look copper, and the battery terminal is not solid copper. They also say that the switch is made of cast iron and has a fragile design.

"The photos make it look like it’s copper. Material is not copper, it’s painted with either copper paint or copper colored paint...." Read more

"...It’s not real copper. It’s just copper coating." Read more

"Nice but a bit big..." Read more

"It was made of cast iron and should have been copper. It broke when my husband was trying to install it." Read more

Infinitely customizable
5 Stars
Infinitely customizable
You can unscrew and relocate every part of it
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Top reviews from the United States

Reviewed in the United States on March 1, 2024
Size: Positive (Vertical / Horizontal)Verified Purchase
Reviewed in the United States on January 16, 2024
Size: Negative (Vertical)Verified Purchase
Reviewed in the United States on December 3, 2023
Size: Positive (Vertical / Horizontal)Verified Purchase
One person found this helpful
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Reviewed in the United States on September 8, 2023
Size: Negative (Vertical)Verified Purchase
Reviewed in the United States on January 4, 2024
Size: Negative (Vertical)Verified Purchase
Reviewed in the United States on February 17, 2024
Size: Negative (Vertical)Verified Purchase
Reviewed in the United States on January 8, 2024
Size: Negative (Vertical / Horizontal)Verified Purchase
One person found this helpful
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Reviewed in the United States on January 11, 2024
Size: Negative (Vertical)Verified Purchase

Top reviews from other countries

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V H
5.0 out of 5 stars Good stuff!
Reviewed in Canada on January 13, 2024
Size: Negative (Vertical / Horizontal)Verified Purchase
Tom
5.0 out of 5 stars Works well
Reviewed in the United Kingdom on May 25, 2023
Size: Negative (Vertical)Verified Purchase
Bundy Bears Shed on Youtube.
5.0 out of 5 stars These work well in out vintage tractors as a safety device.
Reviewed in Australia on January 26, 2023
Size: Negative (Vertical)Verified Purchase
岡田克彦
3.0 out of 5 stars 使用済みの製品が届きました。返品しましたがその後の連絡が有りません。
Reviewed in Japan on February 13, 2021
Size: Negative (Vertical / Horizontal)Verified Purchase
darren wells
5.0 out of 5 stars Perfect
Reviewed in the United Kingdom on March 4, 2023
Size: Negative (Vertical)Verified Purchase
One person found this helpful
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