Fits Most Vehicles
12V & 24V
24-Month Warranty
30-Day Returns
Free US Ship $59+
4.9/5 Storewide
  • BOLTHUT Battery Disconnect Switch | BOLTHUT
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+ ★★★★★ 4.9/5 storewide Trusted by 16,000+ drivers

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

$36.99 USD
$73.98 USD $36.99 USD 50%
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Shipping calculated at checkout.

Why Drivers Choose the BOLTHUT™ Battery Kill Switch

Cut the drain that leaves a parked battery flat.

No More Drain

Twist to OFF and parasitic draw stops dead.

One-Twist Cut

Kill or restore power with a quick turn.

Solid Brass

Brass posts carry a clean, low-loss connection.

12V & 24V

Works on cars, trucks, RVs and boats.

Theft Deterrent

Cut power to help stall an opportunist thief.

Built Tough

Die-cast body handles heat and vibration.

Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Fast US & Canada Shipping
30 Day Money Back Guarantee
24-Month Warranty
Free US Shipping Over $59
Guaranteed Safe & Secure Checkout
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Product Information

The BOLTHUT™ Battery Disconnect Switch bolts onto your battery terminal and cuts the slow parasitic drain that flattens a resting battery. Twist the blue knob to OFF and power is fully disconnected from your alarm, clock and modules while the vehicle sits; twist back to ON and everything wakes up as normal. Solid brass contact posts carry a clean 12V or 24V connection, and the die-cast housing stands up to under-hood heat and road vibration. It also works as a master kill switch to help deter opportunist theft. Fits most top-post and common side-post batteries.

Safety: disconnect the negative (ground) terminal first and check your fuses before fitting; if you're not comfortable working near the battery, have a professional install it.

What's in the Box
  • 1 × Battery Disconnect Switch (blue twist knob, ON/OFF marked)
  • Brass contact posts and mounting nuts
  • Quick-Install Guide
  • 24-Month BoltHut Warranty
Specifications
  • Function: manual battery disconnect / master kill switch
  • Voltage: 12V and 24V systems
  • Contacts: solid brass posts
  • Housing: die-cast metal, heat and vibration resistant
  • Control: twist knob, clearly marked ON and OFF
  • Size: approx. 104 mm long × 32 mm tall, compact under-hood footprint
  • Mounting: bolts onto the battery terminal (basic wrench needed for setup)
  • Fitment: fits most top-post and common side-post 12V/24V batteries; some recessed or dual-post terminals may need an adapter (not included)
Shipping & Delivery

Destinations: United States (48 contiguous states) & Puerto Rico, Canada, and 16 more countries worldwide. We don't ship to Alaska & Hawaii at this time.

United States: Processing 1–2 business days · delivery 7–10 business days · Standard $6.98 · Secured $10.98 · FREE over $59.

Canada & international: rates shown at checkout · delivery 7–10 business days (US/CA).

Every order includes full tracking.

30-Day Returns

You have 30 days from delivery to request a return. Email us first at support@bolthut.com — our team confirms your return and sends the authorized return address.

Refunds: issued to your original payment method within 10 business days after inspection.

Please wait for authorization from our team before shipping any return.

24-Month Warranty

Every BOLTHUT™ purchase includes a 24-month warranty covering manufacturing defects — replacement-first: verified issues get a new unit shipped, usually without sending the old one back.

Please inspect your order upon delivery. For shipping damage or a wrong item, contact us within 48 hours with clear photos. Manufacturing defects stay covered for the full 24 months.

Need Help?

Questions about your order? We reply within 24 hours.

Email: support@bolthut.com

Come back to a dead battery after your car, RV or boat sat for weeks? The BOLTHUT™ Battery Disconnect Switch cuts the slow parasitic drain that flattens a resting battery. Bolt it onto your battery terminal, then twist the blue knob to OFF and power is fully disconnected, so nothing trickles to alarms, clocks or modules while you are away. Twist back to ON and everything wakes up like normal. Solid brass contact posts carry a clean 12V or 24V connection, and the die-cast housing shrugs off heat and vibration under the hood. It doubles as a simple master kill switch to help deter opportunist theft on project and classic cars. Fits most top-post and common side-post batteries.
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BOLTHUT Battery Disconnect Switch | BOLTHUT
BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain
$36.99 $73.98 -50%

Does This Sound Familiar?

A battery that keeps dying while the vehicle just sits there.

🔋 "Came back from vacation to a dead battery." 😤 "My RV battery drains every time it sits in storage." 🔧 "Sick of unbolting the terminal every time I park it."
A driver finding a dead car battery after the vehicle sat parked for weeks
⚓ "The boat battery's flat again after a week docked." 🥶 "Winter kills my classic car's battery in the garage." 🔌 "Something keeps draining it while the car's off."

You just want the power off when you're not driving.

Why the Usual Fixes Fall Short

A wrench loosening a corroded battery terminal bolt Unbolting the battery terminal Means a wrench every time and corroded bolts.
A trickle charger cable running to a parked car A trickle charger left plugged in Needs an outlet the vehicle may sit far from.
A hand pulling a fuse from an engine-bay fuse box Pulling the fuse or negative cable Fiddly, easy to forget, and sparks at the post.
Jumper cables clamped to a dead car battery Just jump-starting it again Wears the battery and strands you at the worst time.

You need a clean cut-off you can flip in a second.

The Real Cost of a Battery That Keeps Dying

One Payment vs Paying Forever

Three ways to cut the drain, one that costs the least.

BOLTHUT™ Battery Disconnect Switch$25.99
A remote-control disconnect kit$42.99
A marine dual-battery isolator$59.99

Install it once — it works every single drive after that.

Aftermarket accessory. Not affiliated with, endorsed by, or sponsored by any vehicle manufacturer; brand names used for compatibility reference only. Always check fitment for your exact year/make/model before purchase.

See It Work Before You Buy

Real install, real twist, no guesswork.

NOW PLAYING
Built for Vehicles That Sit

A Battery That Stays Charged

Alarms, clocks and modules sip power around the clock, and after a week or two of sitting your battery is flat.

The BOLTHUT™ Battery Disconnect Switch cuts that draw at the source, so the power is off until the moment you twist it back on.

  • Stops parasitic drain
  • One-twist ON/OFF
  • Solid brass contacts
  • 12V & 24V ready
BOLTHUT Battery Disconnect Switch - Hero Feature | BOLTHUT

Cuts Parasitic Drain

Twisting to OFF fully breaks the connection to the battery.

nothing draws power

Alarms, dash clocks and standby modules stop sipping current, so the battery holds its charge while the vehicle sits.

Come back weeks later and it still cranks.

  • ↳ Stops standby draw
  • ↳ Holds the charge
  • ↳ Fewer jump-starts

One-Twist Kill Switch

A clearly marked knob turns the power off and on.

off in one move

Twist to OFF when you park and ON when you drive — one quick move at the knob, no cables to pull.

The ON and OFF marks leave no guessing.

  • ↳ Clear ON/OFF
  • ↳ Quick to flip
  • ↳ Repeatable

Solid Brass Contacts

The current runs through heavy brass posts, not thin plate.

a clean connection

Brass resists corrosion and carries the load without heat build-up, so starting power stays strong.

Tighten the studs once and forget them.

  • ↳ Brass posts
  • ↳ Corrosion-resistant
  • ↳ Low-loss path

Fits 12V & 24V

One switch handles both common vehicle voltages.

fits most vehicles

Cars, trucks, RVs, campers and boats all run on the same top-post or side-post setup this switch mounts to.

Compact enough to tuck beside the battery.

  • ↳ 12V & 24V
  • ↳ Top & side post
  • ↳ Compact body

DesignedDown to the Detail

The small things you notice every time you park.

🔩

Brass Studs

Heavy brass posts carry current without corroding.

🔄

Sealed Knob

The twist knob stays smooth through heat and grime.

🧭

Clear ON/OFF

Marked positions leave no doubt which way is off.

🧱

Compact Body

A low, tough housing tucks in beside the battery.

One Switch, Every Kind of Layup

Long Storage

Park It and Forget It

Twist to OFF before the vehicle sits, and the battery keeps its charge for weeks instead of going flat.

Seasonal

Winter or Off-Season

Kill the draw during cold layup so your classic or seasonal ride starts on the first turn come spring.

RV & Marine

On the Road or Water

Cut power to the house and start batteries when you're docked or parked, so nothing drains overnight.

Security

A Simple Kill Switch

Turning the power off helps deter an opportunist thief while the vehicle is parked and unattended.

Mounted in a Few Minutes

How to Use It

1

Loosen the Terminal

Use a basic wrench to loosen the battery terminal nut.

2

Mount the Switch

Connect the switch between the post and cable using the brass studs.

3

Tighten Down

Snug the studs so the connection is solid and secure.

4

Twist On or Off

Turn the knob to OFF when you park, ON when you drive.

Before & After the BOLTHUT™

The same battery fully disconnected by the BOLTHUT twist switch
A parked vehicle battery slowly draining with the power still connected
Drains while parked Zero drain, ready to start
★★★★★

Installed this battery disconnect switch on my RV to prevent battery drain while in storage. Very easy to operate with a simple twist of the knob.

David Vance · ✓ Verified Buyer

A Battery That's Ready,Every Time You Return

One small switch that quietly protects your charge.

🚐Keep RV and camper batteries charged through long storage.
⚓Stop overnight drain on boat house and start batteries.
🏎️Leave project and classic cars ready to fire up.
Everyday use

How the BOLTHUT™ Compares

BOLTHUT™

Solid brass contact posts
Sealed twist knob, clear ON/OFF
Fits 12V and 24V, top & side post
Die-cast metal housing
Full disconnect, no standby draw
24-month warranty and US support
Product

Generic Switches

Thin plated posts that corrode
Exposed lever that's easy to bump
Single fitment only
Brittle plastic that cracks
Loose contact still trickles power
No warranty, no help

What's in the Box

Everything you need to mount it and cut the drain.

BOLTHUT battery disconnect switch with brass posts and mounting nuts
1

1 × Disconnect Switch

Blue twist knob with clearly marked ON and OFF.

2

Brass Contact Posts

Solid brass studs for a clean, low-loss link.

3

Mounting Nuts

Hardware to tighten the switch onto the terminal.

4

Quick-Install Guide

Mounted and cutting drain in a few minutes.

5

24-Month Warranty

Backed by BoltHut support if anything's off.

Our Story

Gear thatearns its spotin your ride

BOLTHUT builds small upgrades for drivers who want their car to feel a little better every day.

🚗

Driver-first

We pick gear we would actually keep in our own vehicles.

🛠️

Built to last

Simple, sturdy designs backed by a 24-month warranty.

💬

Real support

A US-based team that answers within 24 hours.

— The BOLTHUT Team

BOLTHUT battery disconnect switch resting beside a car battery in daylight

What to Expect

From checkout to a battery that holds its charge.

BOLTHUT battery disconnect switch packaged and ready to ship
📦
Step 1

Order & Fast Ship

  • Processed in 1-2 business days
  • US/CA delivery in 7-10 business days
🔧
Step 2

Bolt It On

  • Mount onto the battery terminal
  • Twist to OFF when you park
🛡️
Step 3

Backed by BoltHut

  • 24-month warranty
  • 30-day easy returns

Who It's For

If a parked battery keeps dying on you, this one's for you.

RV & camper owners
RV & camper owners
Boat & marine owners
Boat & marine owners
Classic & project car builders
Classic & project car builders
Seasonal & winter-storage drivers
Seasonal & winter-storage drivers
Off-grid & solar users
Off-grid & solar users
Gift shoppers for car lovers
Gift shoppers for car lovers
★★★★★ ★ 4.9/5 storewide average · Trusted by 16,000+ drivers

What Drivers Are Saying

Review
★★★★★

Installed this battery disconnect switch on my RV to prevent battery drain while in storage. Very easy to operate with a simple twist of the knob.

David Vance

✓ Verified Buyer
Review
★★★★★

Solid brass terminal and durable casing. Works perfectly to cut off power.

Sarah Jenkins

✓ Verified Buyer
Review
★★★★★

Great safety product! I installed this on my project car that sits in the garage for weeks at a time. It completely stops parasitic draw and keeps the battery fresh. The turn knob feels very secure and clearly marks the power-on and power-off states. Highly recommended!

Robert Taylor

✓ Verified Buyer
Review
★★★★★

Very easy to install and works exactly as described.

Emily Watson

✓ Verified Buyer
Review
★★★★★

I bought this for my boat battery to ensure everything is fully shut off when we are docked. The heavy-duty housing feels durable and well-built. It took less than five minutes to hook up and completely eliminates the risk of a dead battery.

Michael Carter

✓ Verified Buyer
Review
★★★★★

Compact design, excellent quality, and gives great peace of mind.

Jessica Reed

✓ Verified Buyer
Questions, Answered

Frequently Asked Questions

Everything you might wonder before ordering. Contact us — we reply within 24 hours.

Will it fit my battery?
It fits most 12V and 24V batteries with standard top posts and common side posts. The brass studs connect between your post and cable.
Is it hard to install?
No. Loosen the terminal with a basic wrench, mount the switch on the post, and tighten it down. After that, on and off is just a twist.
How fast is shipping?
We process orders in 1-2 business days, with delivery across the US and Canada in about 7-10 business days.
What if I change my mind?
You're covered by a 30-day return window, even if it simply isn't the right fit for your setup.
Is there a warranty?
Yes, a 24-month warranty. If anything's wrong, we send a replacement first so you're never left waiting.
Does it fit every battery terminal?
It fits standard top posts and common side posts. Some recessed or dual-post terminals may need an adapter, which isn't included. No product guarantees protection in all situations.
🔒 Secure checkout
🚚 Free US shipping $59+
🔄 30-day easy returns
BOLTHUT gear in daily use BOLTHUT gear in daily use BOLTHUT gear in daily use BOLTHUT gear in daily use

Kill the Drain for Good

Twist the power off and keep your battery ready to start.

Bolt it onto your terminal, twist to OFF when you park, and the parasitic drain stops until you twist it back on, from long winter storage to the weekend on the water.

Add to Cart
Bolt-On Setup24-Month Warranty30-Day Returns

Customer Reviews

Overall rating: 4.8 / 5 from 800 reviews.

Customer photo review of BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

This battery cut-off switch exceeded my expectations in terms of build quality and functionality. The solid metal and brass connections provide excellent electrical conductivity with zero voltage drop detected on my meter. Installation was quick and required no special modifications. The color-coded indicator clearly shows ON and OFF positions so there is no guessing game. If you have an RV, boat, or stored vehicle, this switch is an essential accessory to prevent battery degradation and energy waste.

Jeffrey L. 5/5 Verified

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

Customer photo review of BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

I purchased two of these for my lawn mower and my farm truck. Both had parasitic power drains that kept killing new batteries. Since mounting these heavy-duty disconnect switches, the problem is 100% solved. Turning the power off is as easy as twisting the sturdy knob—no tools needed. The safety and convenience it adds are unbeatable for the price point. Highly recommend to anyone looking to extend their vehicle battery lifespan!

Brenda K. 5/5 Verified

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

Customer photo review of BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

This battery cut-off switch exceeded my expectations in terms of build quality and functionality. The solid metal and brass connections provide excellent electrical conductivity with zero voltage drop detected on my meter. Installation was quick and required no special modifications. The color-coded indicator clearly shows ON and OFF positions so there is no guessing game. If you have an RV, boat, or stored vehicle, this switch is an essential accessory to prevent battery degradation and energy waste.

Edward T. 4/5 Verified

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

I purchased two of these for my lawn mower and my farm truck. Both had parasitic power drains that kept killing new batteries. Since mounting these heavy-duty disconnect switches, the problem is 100% solved. Turning the power off is as easy as twisting the sturdy knob—no tools needed. The safety and convenience it adds are unbeatable for the price point. Highly recommend to anyone looking to extend their vehicle battery lifespan!

Deborah K. 5/5 Verified

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

I have a classic muscle car that only gets driven once or twice a month. Before buying this switch, I constantly had to hook up a trickle charger or jump-start it due to minor electrical drains. This power-off switch was extremely straightforward to fit onto the battery terminal. The knob turns crisp and locks in place firmly, ensuring complete power isolation. I left the car sitting for over a month and it fired up immediately after turning the knob back on. Best inexpensive upgrade for seasonal or weekend vehicles!

William M. 5/5 Verified

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain

I purchased two of these for my lawn mower and my farm truck. Both had parasitic power drains that kept killing new batteries. Since mounting these heavy-duty disconnect switches, the problem is 100% solved. Turning the power off is as easy as twisting the sturdy knob—no tools needed. The safety and convenience it adds are unbeatable for the price point. Highly recommend to anyone looking to extend their vehicle battery lifespan!

Raymond M. 5/5 Verified

BOLTHUT™ Battery Disconnect Switch — Master Kill Switch, No Drain