10 Best Battery Doctor Car Installation Kits
for January 2022

Recommendations are independently chosen by MOOZ’s editors. Purchases you make through our links may earn us a commission.

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Dual Battery Isolator Kit, 12V 140 Amp Voltage Sensitive Relay VSR Dual Battery Kit Smart Automatic Charger for Marine Car UTV ATV RV Boat Camper Truck

EXCELFU Dual Battery Isolator Kit

12V 140 Amp Voltage Sensitive Relay VSR Dual Battery Kit Smart Automatic Charger for Marine Car UTV ATV RV Boat Camper Truck

by EXCELFU
What We like

Smart Battery Isolator: Battery isolator allows run your accessories from separate battery when the engine is off while keeping your main battery charged and prevents the starting battery from being run down by your equipment. Now you can add more large capacity electrical to your vehicles, such as solar panel, audio, light, etc.

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Product Features

  • VSR Battery Isolator: Battery isolator relay cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged without worry about stuck on road due to drained battery. It's like having two separate power sources for each battery while only having one alternator!
  • IP65 Certified: Heavy duty silicone sealed interior with reinforced case is certified for off-road use, which is water resistant, shock resistant, dust proof and safe to use in harsh condition.
  • Custom Fit: Compact battery isolator can be installed almost anywhere with its 2.6" x 2.6" x 2" size. Great fit for under the seat, under the hood installation for your marine boats, truck, RV, UTV, van, off-road vehicles.

Custom fit: compact battery isolator can be installed almost anywhere with its 2.6" x 2.6" x 2" size. great fit for under the seat, under the hood installation for your marine boats, truck, rv, utv, van, off-road vehicles. Ip65 certified: heavy duty silicone sealed interior with reinforced case is certified for off-road use, which is water resistant, shock resistant, dust proof and safe to use in harsh condition. Vsr battery isolator: battery isolator relay cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged without worry about stuck on road due to drained battery. it's like having two separate power sources for each battery while only having one alternator!

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Master Battery Switch Kit with Screws 12-48V - Power Cut-Off Switch - Battery Isolator Disconnect for Cars, Trucks, RV, Campers, Boats - Waterproof On Off Function Automotive, Marine Switch

AA Ignition Master Battery Switch Kit with Screws 12-48V

Power Cut-Off Switch, Battery Isolator Disconnect for Cars, Trucks, RV, Campers, Boats, Waterproof On Off Function Automotive, Marine Switch

by AA Ignition
What We like

On/Off 2 Position Switch - Made of durable ABS plastic housing with terminal studs made of copper terminals that includes nuts and washers. 275 Amps at 12V DC, 455 Amps intermittent at 12V DC and 1250 Amps momentary at 12V DC. It is advisable to have the switch disconnect the negative side instead of the positive side as voltage can still run through the switch even if its off and still have the ability to short out when installed in the positive side.

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Product Features

  • Great for Cars, Truck, Campers, RV & Boats - This battery master power disconnect switch can be a stand alone or used together with other switches and is great for almost disconnect purposes you can think of for Marine, Automotive and Campers. It comes with rear cover to insulate terminals against any kind of circuit shorts.
  • Battery Power Cutoff Master On/Off Switch - Batteries that are empty and not charged for a long time will shorten the life of the battery causing you to replace it sooner than necessary which can be expensive. This battery cutoff switch allows you to eliminate any power being drawn from the battery when the RV, Camper, Boat, Car or Truck isn't being used after coming home from a trip.
  • OEM Fit, Quality, Finish - This is a complete switch kit manufactured by AA Ignition which includes 4 mounting screws for a hassle free installation, rear and side covers, and nuts and washers for the terminal studs. This battery cutoff disconnect switch safely disconnects your battery to isolate and secure the electrical system.

Battery power cutoff master on/off switch - batteries that are empty and not charged for a long time will shorten the life of the battery causing you to replace it sooner than necessary which can be expensive. this battery cutoff switch allows you to eliminate any power being drawn from the battery when the rv, camper, boat, car or truck isn't being used after coming home from a trip. Oem fit, quality, finish - this is a complete switch kit manufactured by AA Ignition which includes 4 mounting screws for a hassle free installation, rear and side covers, and nuts and washers for the terminal studs. this battery cutoff disconnect switch safely disconnects your battery to isolate and secure the electrical system. Great for cars, truck, campers, rv & boats - this battery master power disconnect switch can be a stand alone or used together with other switches and is great for almost disconnect purposes you can think of for marine, automotive and campers. it comes with rear cover to insulate terminals against any kind of circuit shorts.

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WirthCo 30300 Battery Doctor Standard Side Terminal Bolt

WirthCo 30300 Battery Doctor Standard Side Terminal Bolt

by WirthCo
What We like

Easy and reliable direct connections to the battery

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Product Features

  • Excellent for trailer brake controls and other accessories requiring direct power
  • Solid brass construction
  • Studs accommodate one or several 3/8 inch ring terminals
  • Direct-to-battery power circuits help reduce noise in stereo, communication and other electronic equipment

Solid brass construction Direct-to-battery power circuits help reduce noise in stereo, communication and other electronic equipment Studs accommodate one or several 3/8 inch ring terminals Excellent for trailer brake controls and other accessories requiring direct power

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LotFancy Top Post Knife Blade Master Switch, 12V-24V Battery Disconnect Switch for Car RV Truck Automotive ATV Boat, Solid Brass Battery Isolator Kill Switch (Negative, Vertical)

LotFancy Top Post Knife Blade Master Switch

12V-24V Battery Disconnect Switch for Car RV Truck Automotive ATV Boat, Solid Brass Battery Isolator Kill Switch (Negative, Vertical)

by LotFancy
What We like

EASY TO USEKnife blade type, easy to install & simple to use. When you are not using the car or it is stored for long periods, just simply raise the lever to disconnect the battery from the car. This battery cutoff switch stops unwanted battery drain and helps prevent theft, tampering and unauthorized use

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Product Features

  • HIGH-QUALITYOur battery kill switch is made of solid brass and copper. It features superior performance and good conductivity. It also can be used in marine and corrosive environments and keeps your battery far away from rust and corrosion
  • TOP MOUNTFit for top post terminal with 15-17mm cone, DC 12V-24V system, 250A continuous and 750A crank at DC 12V, on/off 2 position, operate vertically
  • INSTALLATION Firstly, disconnect the battery cables from the battery, always disconnect the negative cable first followed by the positive cable. Attach the battery disconnect to the negative battery terminal and tighten but do not overtighten. With the lever on the switch continuously open, connect the negative battery cable you removed from the battery to the opposite end of the disconnect switch. Make sure you have a good connection
  • COMPATIBLEThis knife blade battery disconnect switch works well for RVs, marine, cars, boats or UTV- all standard car electric system as long as the battery has 15-17mm cone/tapering battery negative post. Only mount on NEGATIVE POST

Installation firstly, disconnect the battery cables from the battery, always disconnect the negative cable first followed by the positive cable. attach the battery disconnect to the negative battery terminal and tighten but do not overtighten. with the lever on the switch continuously open, connect the negative battery cable you removed from the battery to the opposite end of the disconnect switch. make sure you have a good connection Top mountfit for top post terminal with 15-17mm cone, dc 12v-24v system, 250a continuous and 750a crank at dc 12v, on/off 2 position, operate vertically High-qualityour battery kill switch is made of solid brass and copper. it features superior performance and good conductivity. it also can be used in marine and corrosive environments and keeps your battery far away from rust and corrosion Compatiblethis knife blade battery disconnect switch works well for rvs, marine, cars, boats or utv- all standard car electric system as long as the battery has 15-17mm cone/tapering battery negative post. only mount on negative post

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Dual Battery Isolator Kit 12 Volt 140 Amp Voltage Sensitive Relay Complete VSR Double Battery Automatic Charger

RANSOTO Dual Battery Isolator Kit 12 Volt 140 Amp Voltage Sensitive Relay Complete VSR Double Battery Automatic Charger

by ANODIZING RACING
What We like

It can work in dusty, wet and unexpected extreme weather condition.

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Product Features

  • Function: Cause your accessories to run from a separate battery while the engine is not working on your vehicle, and at the mean time holding your main battery charged and your vehicle always ready to work.
  • This package is including 12 Volt 140 Amp Voltage Sensitive Relay Isolator and includes all other accessrioes.It is including instruction.
  • This item can install to most of vehicle,for example Truck, SUV, RV, ATV, UTV, Boat and so on.

This package is including 12 volt 140 amp voltage sensitive relay isolator and includes all other accessrioes.it is including instruction. Function: cause your accessories to run from a separate battery while the engine is not working on your vehicle, and at the mean time holding your main battery charged and your vehicle always ready to work. This item can install to most of vehicle,for example truck, suv, rv, atv, utv, boat and so on.

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6 Foot 2 AWG Gauge Battery Cable Set by Spartan Power

6 Foot 2 AWG Gauge Battery Cable Set by Spartan Power

by Spartan Power
What We like

Perfect for use with a Spartan Power fuse holder kit or power inverter!

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Product Features

  • DON'T NEED A FULL SET? Search Amazon for: Black or Red Single 2 AWG Battery Cable by Spartan Power
  • Includes one red (positive) cable & one black (negative) 2 gauge cable with 5/16" lugs on each end.
  • Beveled, seamless tubular, tin plated copper lugs for superior corrosion and oxidation resistance.

Don't need a full set? search amazon for: black or red single 2 awg battery cable by Spartan Power Includes one red (positive) cable & one black (negative) 2 gauge cable with 5/16" lugs on each end. Beveled, seamless tubular, tin plated copper lugs for superior corrosion and oxidation resistance.

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Stinger SGP38 80-AMP Battery Isolator and Relay,BLACK

Stinger SGP38 80-AMP Battery Isolator and Relay

BLACK

by Stinger
What We like

Universal 12V Applications

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Product Features

  • Prevents primary battery discharge.80A constant 150A peak
  • Extends battery life
  • 80 AMP Battery Isolator and Relay
  • Maximum current transfer

80 amp battery isolator and relay Maximum current transfer Prevents primary battery discharge.80a constant 150a peak Extends battery life

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Handsfree Call Car Charger,Wireless Bluetooth FM Transmitter Radio Receiver,Mp3 Audio Music Stereo Adapter,Dual USB Port Charger Compatible for All Smartphones,Samsung Galaxy,LG,HTC,etc.

LIHAN Handsfree Call Car Charger

Wireless Bluetooth FM Transmitter Radio Receiver, Mp3 Audio Music Stereo Adapter, Dual USB Port Charger Compatible for All Smartphones, Samsung Galaxy, LG, HTC, etc.

by LIHAN
What We like

Music playing:support Bluetooth /USB disk/TF card/ MP3/wma player. With anti-interference performance and CVC technology.Listening to music while charging. Automatically connect memorized paired when power on. 12-Month worry-free.

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Product Features

  • Dual USB car charger: 2 USB charging port to charge most USB Devices. Input 12V/24V, 1a port with USB reading and charge function; smart 3. 1 A charge port which can intelligently identify Android or iPhone devices and charging.
  • Car battery voltage function: Show 3 seconds voltage when plug into the cigarette port. Always keep battery state of health. Then it turn to automatic play mode.
  • More compatibility: wireless Bluetooth FM transmitter adapter for car radio,transfer calling/MP3 music/Cellphone voices to car speaker.Compatible for iPad,iPhone,Samsung,Google,LG,HTC and Bluetooth Device.
  • Hands free function: built-in microphone, switch to hands-free mode automatically from music playing status when receiving calls. Answer/reject/hand up/recall all in One key.

More compatibility: wireless bluetooth fm transmitter adapter for car radio,transfer calling/mp3 music/cellphone voices to car speaker.compatible for ipad,iphone,samsung,google,lg,htc and bluetooth device. Dual usb car charger: 2 usb charging port to charge most usb devices. input 12v/24v, 1a port with usb reading and charge function; smart 3. 1 a charge port which can intelligently identify android or iphone devices and charging. Car battery voltage function: show 3 seconds voltage when plug into the cigarette port. always keep battery state of health. then it turn to automatic play mode. Hands free function: built-in microphone, switch to hands-free mode automatically from music playing status when receiving calls. answer/reject/hand up/recall all in one key.

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2 Gauge 2 AWG 10 Feet Red + 10 Feet Black Welding Battery Pure Copper Flexible Cable + 10pcs of 3/8

WindyNation 2 Gauge 2 AWG 10 Feet Red + 10 Feet Black Welding Battery Pure Copper Flexible Cable + 10pcs of 3/8" Tinned Copper Cable Lug Terminal Connectors + 3 Feet Black Heat Shrink Tubing

by WindyNation
What We like

Cable Lug Specifications: pure copper, tinned for corrosion protection (excellent for outdoor and marine applications), closed end design to protect cable from outdoor environment, wire can be crimped or soldered, excellent conductivity characteristics, flared barrel end for easy entry of cable.

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Product Features

  • Includes 2 AWG Pure Copper Cable + 10pcs 2 AWG Copper Cable Lugs + 3 Feet Black Heat Shrink Tubing. Save time and money by purchasing all components in one product listing.
  • Copper cable is fully annealed per ASTM standards
  • Heat Shrink Tubing: 600 volts maximum, temperature range -55 Celsius to +125 Celsius, resistant to most solvents and fire resistant (polyolefin material), black in color with no printing. REFER TO PHOTO GALLERY FOR A DETAILED SPECIFICATION CHART.
  • WindyNation Power Flex Cable is fully annealed PURE copper, highly flexible (high copper strand count), with a tough, solvent resistant EPDM insulation jacket. REFER TO THE PHOTO GALLERY FOR A DETAILED SPECIFICATION CHART (amperage, voltage, stranding, insulation and copper thickness, etc.)

Heat shrink tubing: 600 volts maximum, temperature range -55 celsius to +125 celsius, resistant to most solvents and fire resistant (polyolefin material), black in color with no printing. refer to photo gallery for a detailed specification chart. Includes 2 awg pure copper cable + 10pcs 2 awg copper cable lugs + 3 feet black heat shrink tubing. save time and money by purchasing all components in one product listing. Copper cable is fully annealed per astm standards WindyNation power flex cable is fully annealed pure copper, highly flexible (high copper strand count), with a tough, solvent resistant epdm insulation jacket. refer to the photo gallery for a detailed specification chart (amperage, voltage, stranding, insulation and copper thickness, etc.)

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2pcs Standard Side Post Battery Terminal 3/8 16 Stud Extender Extension Compatible with GM and Other Accessories to Battery

King Auto Parts 2pcs Standard Side Post Battery Terminal 3/8 16 Stud Extender Extension Compatible with GM and Other Accessories to Battery

by Micro
What We like

Easy and reliable direct connections to the battery

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Product Features

  • Stud thread 3/8-16 Dimensions similar to standard hexagonal nuts
  • Solid brass bolt extender and plated steel nut are used for power hook-up for direct connections of accessories to battery
  • Direct to battery power circuits help reduce noise in stereo, communication and other electronic equipment
  • Excellent for trailer brake controls and other accessories requiring direct power,maintenance free connection

Stud thread 3/8-16 dimensions similar to standard hexagonal nuts Direct to battery power circuits help reduce noise in stereo, communication and other electronic equipment Solid brass bolt extender and plated steel nut are used for power hook-up for direct connections of accessories to battery Excellent for trailer brake controls and other accessories requiring direct power,maintenance free connection

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