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Best Battery Isolator

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NoProductScoreAction
1Stinger SGP38 80-AMP Battery Isolator and Relay9.2Buy Now
2Stinger SGP32 200 AMP Battery Relay Isolator and Relay8.8Buy Now
3KeyLine Chargers 12V 140 Amp Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro Dual Battery Kit8.8Buy Now
4MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator8.6Buy Now
5Dual Battery Isolator Kit8.6Buy Now
6Nilight 1-2-Both-Off Battery Switch8.6Buy Now
7NVX 500 Amp Mobile Audio Relay Battery Isolator8.6Buy Now
8MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charger & Wiring Cable Kit8.4Buy Now
9Dual Battery Isolator 12V 140Amp8.2Buy Now
1012V 140Amp Smart Waterproof Dual Battery Isolator Fits ATV UTV 4WD RZR RV Car Watercraft Marine Boat Truck Caravan Camping(R12140B-T)8.2Buy Now

1. Stinger SGP38 80-AMP Battery Isolator and Relay

  • 80 AMP Battery Isolator and Relay
  • Prevents primary battery discharge.80A constant 150A peak
  • Maximum current transfer
  • Extends battery life
  • Universal 12V Applications

2. Stinger SGP32 200 AMP Battery Relay Isolator and Relay

  • 200 AMP Battery Isolator and Relay
  • Prevents primary battery discharge
  • Maximum current transfer
  • Extends battery life
  • Universal 12V Applications

3. KeyLine Chargers 12V 140 Amp Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro Dual Battery Kit

  • ZERO VOLTAGE DROP: Forget the traditional diode relays and so-called “solid state” devices that can rob you of almost 2 amps of output power! The KeyLine Dual Battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance – with ZERO sacrifice.
  • VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems.
  • RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified.
  • WHAT YOU GET: (1) 140 Amp Voltage Sensitive Relay (VSR); (1) 20 ft red battery cable; (1) 2ft black ground battery cable; (2) positive brass marine type battery terminals; (1) negative brass marine type battery terminal; tinned copper lugs & heat shrink; cable ties; easy-to-follow instructions.
  • BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty.

4. MaySpare 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charging Relay Dual Smart Battery Isolator

  • 12V, 140A, 13.
  • Working Voltage: Having Voltage Sensitive Chip,Rely Cuts in at 13.
  • Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged and Your Vehicle Always Ready to Go and Start When You Want It.
  • Compatibility: This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV’s,marine vehicle, truck, caravan.
  • LIFETIME WARRANTY :100% High Quality and Enjoy Full Life Warranty, Free Exchange

5. Dual Battery Isolator Kit

  • Robust and durable: It’s like having two separate power sources for each battery and only one alternator! This dual battery isolator can also withstand extreme weather conditions, vibration, and IP65 waterproofing.
  • Easy to install: This dual battery isolator kit includes all the parts needed for a complete installation (battery cable, battery terminals, copper lugs, heat shrink tubing, cable ties).
  • Suitable for a wide range of vehicles.
  • What’s in the box: 1x Smart Battery Isolator, 1x6000mm long 10mm square red cable with terminals on both ends, 1x600mm long 10mm square black ground cable with terminals on both ends, 2x positive marine battery terminals; 1x negative marine battery terminals, 3xSC 16-8 copper crimp lugs, 2x red heat shrink, 1x black heat shrink, 1x insulated blue ring termination, 6x300mm cable ties, 4x self-tapping screws, 2xM6 nuts, 2xM6 spring washers.
  • While ensuring quality, it offers a 1-year warranty policy. Please buy with confidence.

6. Nilight 1-2-Both-Off Battery Switch

  • Heavy Duty: ABS plastic housing, durable made for safety use, rear cover insulates terminals against any short of circuits.
  • Purpose: eliminate any power from the battery when vehicle or boat is not in use, disconnects the battery safely.
  • Operation: 1-2-Both-Off,4 positions, 200A continuous at 12VDC, 300A intermittent at 12VDC, 1000A momentary at 12VDC.
  • Compatible: used for 12 – 48VDC systems to isolate and secure the electrical system, can stand alone or be locked together with other switch.
  • Package include:1x battery switch,4 bolts&screws incuded.

7. NVX 500 Amp Mobile Audio Relay Battery Isolator

  • AMP BATTERY ISOLATOR. Great for isolating the second battery to be dedicated to your sound system
  • UNCONVENTIONAL ISOLATOR.
  • POWER HANDLING. Continuous power handling of 500 amps at 12V and surge power handling of 700 amps
  • PRIMARY BATTERY SAVER. Lengthens the life of the primary battery when your vehicle engine is off
  • ELIMINATES BATTERY DRAIN.

8. MaySpare Dual Battery Isolator Kit 12V 140Amp Voltage Sensitive Relay VSR Double Battery Automatic Charger & Wiring Cable Kit

  • 12V, 140A, 13.
  • Working Voltage: Having Voltage Sensitive Chip,Rely Cuts in at 13.
  • Fuction:Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged and Your Vehicle Always Ready to Go and Start When You Want It.
  • Compatibility: This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV’s,marine vehicle, truck, caravan.
  • LIFETIME WARRANTY :100% High Quality and Enjoy Full Life Warranty, Free Exchange

9. Dual Battery Isolator 12V 140Amp

  • Wide Compatibility】——This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV’s,marine vehicle, truck, caravan.
  • Working Voltage】——Voltage Sensitive Relay (VSR) cuts in at 13.
  • Function】——With the engine running the VSR will engage when the starting battery reaches 13.
  • Important Note】——When connecting accessories to your second battery ensure they are fused within 0.
  • 12-MONTH Warranty】——We have exquisite craft, strict quality control along with excellent after-sales service.

10. 12V 140Amp Smart Waterproof Dual Battery Isolator Fits ATV UTV 4WD RZR RV Car Watercraft Marine Boat Truck Caravan Camping(R12140B-T)

  • 5 Year Warranty】Every battery isolator is 100% tested and inspected prior to shipment.
  • Efficiency Charging: AOPEC battery isolator can distribute the charger or alternator current effectively between two batteries.
  • Primary Battery Priority Charging: Prevents primary battery discharge, lengthens the life of the primary battery when your vehicle engine is off.
  • IP65 Weatherproof: Outer plastic-housing and a silicone sealed internallayer, protects your isolator from water,dust,dirt,sand damage.
  • Safety Protection: The protective design of this battery isolator sustains surge protection,over voltage protection and over current protection.

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