Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack)

Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack)

Q: Does the green knob need to be removed in order to disconnect the battery?

Not removed. Simply screw tight to engage battery use and loosen to disengage. The green knob can not fully be removed or misplaced.

Q: What kind of metal is this made out of?

It is made of cast zinc, plated with a thin layer of a yellow metal that is similar to brass or bronze. Cast zinc can easily crack under stress as a few reviews mentioned it.

Q: Should the be mounted on the positive terminal or the negative terminal?

Must be installed ONLY ON THE NEGATIVE terminal of the battery!!! The reason is safety. The positive terminal has a red plastic cover to protect against accidental shorts which can be very dangerous. The negative terminal does not have a plastic cover because if it shorts to a grounded metal part nothing would happen. If you install it on the positive terminal, you will have exposed metal that can accidentally be shorted. Hope my answer also provides the reasoning such that a user will understand the “why” not just the “how”.

Q: If you have dual batteries do you need two switches

Yes, or choose 1-2-both-off switch: https://www.amazon.com/dp/B07PN9CT9H

Product ID: 256924166

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Details

Operation mode
ON-OFF
Current rating
125 Amps
Operating voltage
12 Volts
Contact type
Normally Open
Connector type
Clamp

🔋125A rated current

🔧Knob-type easy install

🛡️Rust & corrosion resistant

Frequently Bought Together

Top Post Battery Disconnect Switch, Ampper Battery Master Switch Isolator for Power Disconnect Cut Off (1 Pack)

Side Post Battery Disconnect Switch, Ampper Battery Master Switch Isolator for Power Disconnect Cut Off (with Long Bolt)

Top Post Battery Disconnect Switch - Quick Disconnect Battery Cut Off Switch for Car Truck Marine RV and Electrical Equipment - 12V/125A - Red

Description

🔋 Twist, isolate, and power down—safety made sleek.

COMPACT SECURE - Small footprint (3.3" x 1.5" x 1.5") with lockable option for added peace of mind.
HEAVY DUTY DURABILITY - Solid brass construction ensures rust-free, long-lasting safety for your vehicle or boat.
POWER CUT WITH A TWIST - Effortlessly isolate your battery with a simple knob turn—no tools needed.
ELIMINATE PHANTOM DRAIN - Protect your battery from unwanted power draw when your vehicle or boat is idle.
UNIVERSAL FIT FOR TOP POST - Designed specifically for 15-17mm tapered negative battery terminals—perfect for cars, RVs, and marine use.

The Ampper Top Post Battery Disconnect Switch is a robust 12V, 125A rated isolator designed for 15-17mm tapered negative battery terminals. Featuring a user-friendly knob for quick on/off power control, its solid brass build resists rust and corrosion, ensuring durable protection. Ideal for cars, boats, RVs, and ATVs, it prevents battery drain during inactivity, enhancing battery life and system safety.

Specifications

Manufacturer	Ampper
Brand	Ampper
Model	Am-CBS21
Product Dimensions	8.38 x 3.81 x 3.81 cm; 124.74 g
Item model number	Am-CBS21
Exterior	metal
Manufacturer Part Number	Am-CBS21
Special Features	eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely, used for top post, used for car battery systems, isolate and secure the electrical system
Lift Type	ON-OFF
Voltage	12 Volts
Wattage	1500 watts
Item Weight	125 g

Have a Question? See What Others Asked

Does the green knob need to be removed in order to disconnect the battery?

What kind of metal is this made out of?

Should the be mounted on the positive terminal or the negative terminal?

If you have dual batteries do you need two switches

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