Best Keyline Chargers in 2026

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. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.

VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!

RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. Great for extreme vibration applications as well.

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 ATV/UTV Isolator is the only SMART unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood or in your offroad rig to get close to your dual battery setup.

VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems in your ATV/UTV vehicle. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!

RUGGED DURABILITY: Unlike other chargers on the market today, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments.

DUAL BATTERY ISOLATOR 12V KIT – Measuring only 2.6" x 2.6" x 2", it's the perfect dual batteries isolation kit for under the hood or Battery Relocation Kit. Say goodbye to power-robbing traditional battery isolator diodes, solenoids, or battery disconnect switch 12v with our Battery Isolator 12V that delivers optimal performance without sacrificing power.

DUAL BATTERY KIT by Keyline Charger is a Voltage Sensitive Relay that charges two battery systems. It ensures that the primary battery is always charged and ready to start the vehicle by cutting in at 13.3 volts and cutting out at 12.8 volts. It's like having two power sources with only one alternator.

RUGGED DURABILITY: The ideal choice for those who require a reliable marine battery isolator or a dual battery smart isolator for their car audio battery charger needs. The KeyLine Automatic 140 Amp Dual Battery Isolator is a durable product that can withstand extreme weather conditions and vibrations. Its IP65 certification guarantees its safety for off-road use, even in dusty and wet environments.

OUR FUSE HOLDER KIT INCLUDES everything you need: (2) ANL Type Fuse Holders; (4) Matching 60-amp ANL Professional Grade Ceramic Fuses; (6) 100% Copper 6-8 AWG Wire Compatible Lugs; (6) Pre-Cut Shrink Wrap Tubing. By choosing our complete fuse kit, you'll get a hassle-free, one-stop-shop solution for all your installation needs. Our professional kit is built with the highest quality materials. Never worry about missing a crucial component and getting stuck in the middle of your install again.

RELIABLE & DURABLE: Our Keyline Charges ANL Fuse Kit is a must-have for anyone looking for reliable and durable fuse protection. This mega fuse holder is capable of handle 0/2/4/6/8 AWG wiring and can support a variety of car audio and battery setups. Designed to withstand harsh conditions, this kit is built to last. The 60amp inline fuse is a key feature that makes it perfect for high-powered systems. Trust us, you won't be disappointed with this top-quality fuse block kit.

THERMAL AND ARC PROTECTION: It's crucial to ensure that your electrical systems are well-protected against high temperatures. Our ANL fuse holder professional kit offers exceptional thermal and arc protection for your vehicle's electrical system. With a ceramic ANL 60A fuse, our kit is designed to prevent damage to your electrical systems even after a high current episode, making it the safest option for high-amperage vehicle applications.

OUR FUSE HOLDER KIT INCLUDES everything you need: (2) ANL Type Fuse Holders; (4) Matching 150-amp ANL Professional Grade Ceramic Fuses; (6) 100% Copper 6-8 AWG Wire Compatible Lugs; (6) Pre-Cut Shrink Wrap Tubing. By choosing our complete fuse kit, you'll get a hassle-free, one-stop-shop solution for all your installation needs. Our professional kit is built with the highest quality materials. Never worry about missing a crucial component and getting stuck in the middle of your install again.

RELIABLE & DURABLE: Our Keyline Charges ANL Fuse Kit is a must-have for anyone looking for reliable and durable fuse protection. This mega fuse holder is capable of handle 0/2/4/6/8 AWG wiring and can support a variety of car audio and battery setups. Designed to withstand harsh conditions, this kit is built to last. The 150amp inline fuse is a key feature that makes it perfect for high-powered systems. Trust us, you won't be disappointed with this top-quality fuse block kit.

THERMAL AND ARC PROTECTION: It's crucial to ensure that your electrical systems are well-protected against high temperatures. Our ANL fuse holder professional kit offers exceptional thermal and arc protection for your vehicle's electrical system. With a ceramic ANL 150A fuse, our kit is designed to prevent damage to your electrical systems even after a high current episode, making it the safest option for high-amperage vehicle applications.

Meet the GENIUS10 - Similar to our G7200, just better. It's 17% smaller and delivers over 115% more power. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.

Do more with Genius - Designed for 6-volt and 12-volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free, plus lithium-ion batteries (lifepo4).

Enjoy precision charging - An integrated digital thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.

Meet the GENIUS1 - Similar to our G750, just better. It's 35% smaller and delivers over 35% more power. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.

Do more with Genius - Designed for 6-volt and 12-volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free, plus lithium-ion batteries (lifepo4).

Enjoy precision charging - An integrated digital thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.

Heavy-duty group 24-31 battery box for 12-volt marine, RV, boat, camper, and travel trailer batteries with an adjustable divider to accommodate various group sizes..Fit Type: Universal Fit

Features patented locking tabs to fasten the lid to the base securely and reinforced handles to prevent cracking during relocation.

Built for rugged environments with an impact resistance down to minus 20-degrees Fahrenheit, and unaffected by acid, gas, oil, as well as, UV exposure.

Heavy-duty group 27 battery box for 12-volt marine, RV, boat, camper, and travel trailer batteries.

Features patented locking tabs to fasten the lid to the base securely and reinforced handles to prevent cracking during relocation.

Built for rugged environments with an impact resistance down to minus 20-degrees Fahrenheit, and unaffected by acid, gas, oil, as well as, UV exposure.

[Package Includes]: You will receive pair of Quality battery terminals for Nissan, including red positive and black negative.

[Wide Application]: The car terminal assembly is compatible with Nissan models from 1998 to the present; The car battery connectors are widely compatible with Altima, Maxima, Sentra, Murano, Pathfinder, Quest, Titan, Armada etc.; It is a nice substitute for battery connector terminal.

[Quality Material]: the battery terminal with a plastic cover is made of quality copper, and has galvanized surface, which is rust-proof and durable.

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. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.

VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!

RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. Great for extreme vibration applications as well.

[4 WAY BATTERY TERMINAL] Made of high-quality brass and steel material which is corrosion resistant with excellent electrical conductivity that can reduce voltage distortion and transmission loss. And it has 4 ports for multiple cable connections, wiring is easy and convenient to modify.

[POSITIVE & NEGATIVE LABELED] Positive and Negative is clearly labeled on the battery terminal connectors that you can easily recognize.

[WIDELY USE] Our battery terminal connectors are compatible with cars, vans, caravan, tachts, trucks, pickups, buses, etc. Works on round post auto batteries SAE/JIS Type A posts. Please be sure to connect correct terminal to correct polarity.

High-Quality: Made of tinned copper, it has 4 ports for multiple cable connections, with good electrical conductivity and corrosion resistance, mainly used for SAE / JIS TYPE A rear car battery.

Widely Applicable: Our battery terminal connectors suitable for cars, vans, motorhomes, caravan, truck batteries, etc. Please be sure to connect correct terminal to correct polarity.

Size: For wires diameters 5.2 - 7.4mm (AWG gauges 1 - 4). Minimum wire size: 16mm (5/8"). Max wire clamp: 9.5mm/0.37in, mini wire clamp: 6.5mm/0.25in. Positive inner diameter: 17.5~19.1mm, negative inner diameter: 15.9~17.5mm.

Fine-stranded cable that has a voltage of 600 volts and is rated for MTW/THW/AWM and is also sunlight resistant, can be buried underground and can handle temperatures up to 105 degrees Celsius

Copper lugs on either side of the cable measures 3/8 inches and have an extremely low coefficient of thermal expansion which can help lower the risk of fire hazards during connection

Durable connection cable that can be used to connect battery banks or cells for products like backup grids, RV hookups, golf carts, emergency systems, solar-powered devices and much more

Shuts off automatically when battery cell is at proper level, no over filling

Features the double action fast flow valve tip that prevents after-drip

This 2 quart capacity battery filler is safe to use with battery acid.

√Package--2 Pack Standard Stud thread 3/8-16, thread sizes and thread pitches of any kind can be used.

√Fitment--Excellent for trailer brake controls and other accessories requiring direct power,maintenance free connection.

√ Function--Direct to battery power circuits help reduce noise in stereo, communication and other electronic equipment.

Large capacity battery storage organizer with batteries tester(BT-168): Battery holder has two sided design to store up to 269 batteries, fits for batteries variety pack meet all your daily needs. Battery case comes with batteries checker, which can help you quickly test the life of battery pack you have and classify them. (Battery box and tester only, not include any batteries)External: 14.1*3.5*8 inches.

Unique double sided battery box: Battery storage case front side holds 70 *AAA 3A, 66*AA 2A, 12*D, 12*C, 12*9 Volt, 18*3v lithium coin cell batteries,1*battery tester vertically, back side holds 14*AAA, 14*AAAA 4A, 12*AA,6*18650, 6*CR2, 12*CR123A, 10*4LR44, 5*23A various odd sizes flat. Battery caddy perfectly fits for Duracell/ for Energizer Alkaline/ for ACDelco/ for Panasonic.

Home office battery organization and storage: AAA battery case made of strong, heavy-duty plastic, resistant to damage and smooth cover, water resistant, clear enough to find what batteries you need. Battery keeper has well cut insert room fits different-sized batteries snugly, also can tightly fix all batteries in the groove, avoid the friction between batteries, plastic room design not easy to tear than the foam,make your batteries more safe and long time use.

SOLID PROTECTION - Busbars installed in water prone areas require the kind of protection that most "universal" products just can’t handle.  Our fully enclosed, waterproof busbars shield your wiring against water intrusion and accidental shorts.

BUILT BETTER - You take pride in your project, we take pride in our product. We use copper, not brass, for improved conductivity and corrosion resistance.  And the box is heavy-gauge nylon, not cheap plastic, for better heat resistance and longevity.

A COMPLETE KIT - Our busbar includes all of the seals, terminals and mounting bolts you'll need to get the job done. We even include a 2' 4 AWG power wire; because there’s nothing worse than missing that one small part you need to finish a project!

·[Compatible Model] 2 pack Batteries and Charger Kit fully compatible with GoPro Hero 9 AHDBT-901 and Gopro Hero 10 AHDBT-1001

·[3 Channels with Smart LED Indicator Light] Charges up to 3 rechargeable batteries in independently or Simultaneous from any 5V 2A max USB power source. Each port comes with its own independent status indicator to monitor each individual battery's charging status.Red means charging, green means completed.

·[Multiple Protection] Built-in Over Charge Protection, Over Current Protection, Over Voltage Protection, Short Circuit Protection,over-heating protections and high-quality fire-resistant construction. ensures you and your devices safety.

Purpose: AP-50BI battery cable terminal crimping tool is designed to crimp 8, 6, 4, 2AWG copper / tinned eyelets in special trapezoid profile.

Suitable for: Heavy duty wire lugs, battery cable ends, bare copper eyelets, tubular ring terminal connectors.

Rotary Die Set: Rotating color coded jaw allows easy identification and one hand die change.

【Extend 2-4H Playtime】With an upgraded 5000mAh huge-capaity, this oculus quest 2 battery pack can extend your playtime 2-4H when fully charged, depending on the game you're playing and your device settings

【Exclusive and Perfect Design】To make customers more convenient, Saqico 2022 latest head strap battery pack is specially designed for oculus/meta quest 2, headphones can be used without adapters, fit perfectly to the quest 2

【Slim and Protable】Slim design and lightweight, this meta quest 2 charger is only 2.96oz, will not add any significant weight to your VR headset; at the same time, it can also be carried in your pocket or bag for your charge other Type-C device

【Function】Our Battery Terminals are Made of Zinc Alloy for Excellent Electrical Conductivity and Corrosion Resistance, Protecting the Battery Column from Corrosion and Extending Battery Life.

【Easy to Install】There are 0/2/4/6/8 AWG Inputs.Compatible with Most Models of Batteries.Battery terminals with adjustable copper spacers allow for more flexible connections when the tapered posts are not large enough.

【Universal Fit】The Heavy Duty Battery Terminal Connectors are Suitable for most Cars,RVs,Marines,Trucks,Boats,Motorcycles and so on.Designed for Multiple Cable Connections.

【 3200 mAH Rechargeable Battery Packs for Xbox One Controller 】 Cute design battery packs for xbox one controller, it comes with 4X 3200mAh rechargeable batteries , works for your Xbox Series X|S Xbox One/ Xbox One S / Xbox One X/ Xbox One Elite controllers. 4 different colored batteries let you know easily which is fully charged and which is not.

【Fast Charging & Long Lasting Battery Pack 】 The advanced design of battery charger allows 4 xbox series batteries to be charged simultaneously or individually. it takes 5 hours to fully charge and can provide 32 HOURS long playing time, support your family and friend to play time together as well and enjoy the fun of game

【No need to buy disposable batteries all the time anymore】This NI-MH Battery for xbox one controller is rechargeable,they can be recharged up to 2000+ times ,you do not Need to wast a lot of money to buy disposable batteries any longer . so it’s so nice to have rechargeable batteries. Four batteries for xbox one controller keeps you gaming without interruption. Save a lots money and extend your game time.

✅【Storage Design】This is the charger used for the Insta360 X3 camera(Batteries no include).The case cover can be kept closed,the battery will not be damaged due to exposure,It's easy to carry in a bag.

✅【Smart Fast Charging Mode】Fast charge up to 80% with no over heating issues,It can identify the high and low charge batteries,and allocate the highest power first to fully charge the high charge batteries to meet your needs at the fastest speed.

✅【LED Intelligent Indicator】The intelligent LED indicator can clearly display the charging amount.

【More Power for More Shots】A fully charged 2600mAh NP-FZ100 battery prolongs your camera's runtime to capture more photos and shoot longer videos. Carry 3 backup batteries for emergency and you're never left without power.

【Standard Compatibility】Works with these popular camera models that use NP-FZ100 batteries: Sony Firmware 2.0, Sony Alpha A7 III, A7 IV, A7R III, a7R IV, A7R3, A7C, A9, A9 II, A6600, Alpha 9R, A9R, 9S. (NOTE: NOT fit for Sony A7 II Camera.)

【Convenient Charging】3-channel charger can charge 3 batteries simultaneously, and each charging slot works independently. Micro USB & Type-C port input (5V/2.1A), can charge wherever there is a USB jack by connecting with wall charger, car adapter, power bank etc. Ideal for travel, camping, other outdoor/indoor activities.

【Rugged and Durable】: The battery terminal connector is made of excellent iron galvanized material, which conducts electricity efficiently and reduces voltage distortion and transmission loss. Rugged and durable, with excellent resistance to rust, oxidation and corrosion. The protective shell is made of hard plastic, tightly waterproof and resistant to wear and tear.

【Widely Applicable】: The positive and negative electrodes have the same appearance, with different hole diameter sizes. The positive pole hole is 0.75 inches (19mm) in diameter and the negative pole is 0.67 inches (17mm). They are suitable for most car models, such as sports cars, minivans, SUVs, large vans, trucks, taxis, etc. Please check if the size matches your car before you buy.

【Common Specification】: In the battery cable terminal clips, the red plastic casing is the positive battery terminal and the black plastic casing is the negative battery terminal, red and black are a pair. We provide two kinds of packaging for you, one pair and two pairs, so that you can choose to buy according to your actual needs.

【WHAT YOU GET】: The package includes 1 pair of battery terminals. 243407F000 with red plastic case is the positive battery terminal, 243407F001 with black plastic case is the negative battery terminal.

【COPPER & ABS MATERIAL】: The battery termination connector is made of durable copper, which has excellent enough properties to resist any rust, oxidation or corrosion. The bottom protective housing is made of tough plastic material that is hard enough to protect the battery terminals from dust and moisture penetration.

【FITMENT】: The size of the positive battery terminal is 0.71 inches/18 mm and the size of the negative battery terminal is 0.63 inches/16 mm. This automotive terminal assembly is widely available for Nissan models from 1998 to present. We recommend that you confirm that it is the right size for your car before you buy it.

[Package Includes] The package includes 1 battery hold-down bracket, 2 10-inch J-shaped hooks, 2 sets of accessories (applicable to different installation types) - 2 hexagon nuts and wing nuts, 2 rubber protective sleeves, 2 protective rubber washers, 2 spring lock washers and 2 flat washers.

[Size] The total length of the battery fastening bracket is 218 mm (8.58 "), the distance between the bolt centers is 190 mm (7.48"), and the bolt length is 250 mm (10 "). Please measure the diameter of the primary battery before purchasing to avoid purchasing products with incorrect size.

[High Quality] The car battery holder is made of high-quality aluminum alloy, which is firm, rust-free and non-oxidizing. The thickened aluminum design on the side enhances the corrosion resistance and durability of the product. The surface of the bracket is anodized to obtain a lasting finish.

New OEM Polaris Thermister

OEM Part Number: 4010274

Item only fits specific models listed. The picture could be generic.