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Car Batteries, Power & Battery Accessories

Sometimes your high powered audio systems are going to require too much power than what your normal battery is able to produce. Lucky for you, you will find your ideal high-performance power cells right here as we offer the best car battery prices online. We also carry a large variety of auto accessories and battery chargers to help you with the installation of your high performance 12 volt battery or power cell.

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Mean Green Alternators MG1390

High Output Alternator for select 2009-2025 vehicles from Ram, Dodge

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High Output Alternator for select 2009-2025 vehicles from Ram, Dodge

• High output alternator
• Compatible with select 2009-2025 vehicles from Ram, Dodge
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

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$519.99

In stock.

• High output alternator
• Compatible with select 2009-2025 vehicles from Ram, Dodge
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

Stinger SPW314BK

500 ft. 14 Gauge Pro Series OFC Primary Wire (Black)

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500 ft. 14 Gauge Pro Series OFC Primary Wire (Black)

• 500 ft. 14 Gauge Pro Series Primary Wire
• Pure (OFC) Oxygen Free Copper
• High current transfer and strand count
• Chemical and Temperature Resistant
• Wiring Type: Hook-Up primary wire
• Color: Black

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List price $339.00
-38% $211.00

Available

Ships in 10-14 days

• 500 ft. 14 Gauge Pro Series Primary Wire
• Pure (OFC) Oxygen Free Copper
• High current transfer and strand count
• Chemical and Temperature Resistant
• Wiring Type: Hook-Up primary wire
• Color: Black

Stinger SPW314RD

500 ft. 14 Gauge Pro Series OFC Primary Wire (Red)

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500 ft. 14 Gauge Pro Series OFC Primary Wire (Red)

• 500 ft. 14 Gauge Pro Series Primary Wire
• Pure (OFC) Oxygen Free Copper
• High current transfer and strand count
• Chemical and Temperature Resistant
• Wiring Type: Hook-Up primary wire
• Color: Red

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List price $339.00
-38% $211.00

Available

Ships in 10-14 days

• 500 ft. 14 Gauge Pro Series Primary Wire
• Pure (OFC) Oxygen Free Copper
• High current transfer and strand count
• Chemical and Temperature Resistant
• Wiring Type: Hook-Up primary wire
• Color: Red

Rockford Fosgate RFDGML

Platinum Plated Long GM Battery Post Extender For Double Stacked Terminals

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Platinum Plated Long GM Battery Post Extender For Double Stacked Terminals

• HPP plating for superior corrosion resistance
•Custom tooled solid brass
• Allows additional power or ground connections
• Contains One (1) Terminal Bolt

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2
$14.99

In stock

Only 2 Left!

• HPP plating for superior corrosion resistance
•Custom tooled solid brass
• Allows additional power or ground connections
• Contains One (1) Terminal Bolt

Shuriken SK-BT120-BX

Battery Box for SK-BT120 Battery

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Battery Box for SK-BT120 Battery

• Made with heavy-gauge steel
• Box is universal
• High quality at an affordable price
• Bottom of the boxes have predrilled flanges

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List price $57.99
-10% $51.99

In stock

Only 3 Left!

Used from: $31.19

• Made with heavy-gauge steel
• Box is universal
• High quality at an affordable price
• Bottom of the boxes have predrilled flanges

NVX XSBI80

80-Amp Microprocessor-Controlled Dual Sensing Smart Battery Isolator and Relay (Handles up to 150-Amp Surge)

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80-Amp Microprocessor-Controlled Dual Sensing Smart Battery Isolator and Relay (Handles up to 150-Amp Surge)

• 80-Amp continuous / 150-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

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List price $49.99
-50% $24.99

In stock

Used from: $17.49

• 80-Amp continuous / 150-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

Shuriken SK-BT45

12V 45Ah Absorbed Glass Mat (AGM) Rechargeable Battery

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12V 45Ah Absorbed Glass Mat (AGM) Rechargeable Battery

• 12-volt Automotive Absorbed Glass Mat (AGM) Battery
• Sealed Absorbed Glass Mat (AGM) design
• Perfect for 1250 watts car audio stereo systems
• Can be mounted in any position
• Can be fully discharged and re-charged

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List price $334.99
-10% $300.99

In stock

Only 2 Left!

Rust and Weather Resistant AGU Fuse Holder (Belva BAGUH2)

High Quality Element Resistant AGU Fuse Holder for Excellent Power Transfer

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High Quality Element Resistant AGU Fuse Holder for Excellent Power Transfer

• Clear Coating to Prevent Rust and Weather Damage
• Designed for AGU Fuses
• Fuse Not Included

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List price $9.99
-50% $4.99

In stock

• Clear Coating to Prevent Rust and Weather Damage
• Designed for AGU Fuses
• Fuse Not Included

Mean Green Alternators MG1627

High Output Alternator for select 2011-2020 vehicles from Ford

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High Output Alternator for select 2011-2020 vehicles from Ford

• High output alternator
• Compatible with select 2011-2020 vehicles from Ford
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

shipping truck icon Free shipping in USA. Provide zip for delivery date.
$879.99

In stock.

• High output alternator
• Compatible with select 2011-2020 vehicles from Ford
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

Mean Green Alternators MG1641

High Output Alternator for select 2013-2020 F-250 Super Duty and F-350 Super Duty

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High Output Alternator for select 2013-2020 F-250 Super Duty and F-350 Super Duty

• High output alternator
• Compatible with select 2013-2020 F-250 Super Duty and F-350 Super Duty
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

shipping truck icon Free shipping in USA. Provide zip for delivery date.
$879.99

In stock.

• High output alternator
• Compatible with select 2013-2020 F-250 Super Duty and F-350 Super Duty
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

Rockford Fosgate RFFMXI

4 AWG or 8 AWG Inline MAXI-Fuse Holder

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4 AWG or 8 AWG Inline MAXI-Fuse Holder

• Accepts 4 AWG or 8 AWG wire
• Custom tooled solid brass
• HPP plating for superior corrosion resistance
• Platinum Finish

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1
$14.99

In stock

Only 2 Left!

• Accepts 4 AWG or 8 AWG wire
• Custom tooled solid brass
• HPP plating for superior corrosion resistance
• Platinum Finish

NVX XMANL48

4/8 Gauge AWG Mini-ANL/MANL/AFS In-ine Fuse Holder for Car Audio and Marine Audio

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4/8 Gauge AWG Mini-ANL/MANL/AFS In-ine Fuse Holder for Car Audio and Marine Audio

• Mini-ANL/MANL/AFS Fuse Holder
• One 4 or 8 AWG Input
• One 4 or 8 AWG Output
• Solid Brass With Satin Chromed Terminals
• No-fail Termination and Current Flow

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List price $9.99
-20% $7.99

In stock

• Mini-ANL/MANL/AFS Fuse Holder
• One 4 or 8 AWG Input
• One 4 or 8 AWG Output
• Solid Brass With Satin Chromed Terminals
• No-fail Termination and Current Flow

JL Audio XMD-MCB-80

80 Amp Waterproof, Ignition Protected Thermal Circuit Breaker

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80 Amp Waterproof, Ignition Protected Thermal Circuit Breaker

• Manual Reset Design with High-Visibility Switch
• Suitable for use in marine engine compartments and fuel tank spaces
• Withstands immersion in water up to 1 meter deep
• Stainless Steel Connection Points

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$109.99

In stock

Only 1 Left!

• Manual Reset Design with High-Visibility Switch
• Suitable for use in marine engine compartments and fuel tank spaces
• Withstands immersion in water up to 1 meter deep
• Stainless Steel Connection Points

Stinger SPT55301 (Chrome)

PRO Series Battery Terminal, Works w/ Both Positive and Negative Terminals

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PRO Series Battery Terminal, Works w/ Both Positive and Negative Terminals

• PRO Series Battery Terminal
• Accepts Any 5/16” Ring Terminal
• One 4 Gauge and One 8 Gauge Output
• Works with Both Positive and Negative Terminals
• High power Connection
• Multiple Output Design

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List price $49.00
-49% $24.99

In stock

Only 2 Left!

• PRO Series Battery Terminal
• Accepts Any 5/16” Ring Terminal
• One 4 Gauge and One 8 Gauge Output
• Works with Both Positive and Negative Terminals
• High power Connection
• Multiple Output Design

Limitless Lithium 4SPOT-LUGAL

4-Spot Universal Aluminum Lug-Style Ring Battery Terminals (Sold as Pair)

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4-Spot Universal Aluminum Lug-Style Ring Battery Terminals (Sold as Pair)

• 4-Spot Universal Lug-Style Ring Battery Terminals
• Designed for large-gauge power and ground connections
• Aluminum-plated build that resists corrosion
• Compatible with car, motorcycle and powersports applications
• Sold as pair

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$30.00

Available

Ships in 10-14 days

• 4-Spot Universal Lug-Style Ring Battery Terminals
• Designed for large-gauge power and ground connections
• Aluminum-plated build that resists corrosion
• Compatible with car, motorcycle and powersports applications
• Sold as pair

Rockford Fosgate RFDB4 Platinum Battery Terminal

Positive/Negative Battery Terminal with 4 AWG/8 AWG Iinputs/Outputs

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Positive/Negative Battery Terminal with 4 AWG/8 AWG Iinputs/Outputs

• Positive or Negative Battery Terminal
• 8 AWG or 4 AWG Inputs
• Custom Tooled Brass
• HPP Plating
• Strong Plastic Casing

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$29.99

Available

Ships in 10-14 days

• Positive or Negative Battery Terminal
• 8 AWG or 4 AWG Inputs
• Custom Tooled Brass
• HPP Plating
• Strong Plastic Casing

4 Pack of 80 Amp Nickel-Plated AGU Fuse (Belva BAGU80)

Four fuses per order. High quality 80 Amp AGU Fuses

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Four fuses per order. High quality 80 Amp AGU Fuses

• 80A AGU Fuse
• 4 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

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1
List price $6.99
-43% $3.99

In stock

• 80A AGU Fuse
• 4 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

Kicker KMWPR820 (47KMWPR820)

20 ft. 8 Gauge Full-Spec Hyper-Flex Marine Power Wire (Red)

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20 ft. 8 Gauge Full-Spec Hyper-Flex Marine Power Wire (Red)

• 8 gauge Power Cable
• OFC (100% Oxygen-Free Copper) material
• Full-spec hyper-flex cable design
• Plated in anti-corrosive 99.9% tin
• Length: 20 feet (6 meter)

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$29.99

In stock

Only 3 Left!

• 8 gauge Power Cable
• OFC (100% Oxygen-Free Copper) material
• Full-spec hyper-flex cable design
• Plated in anti-corrosive 99.9% tin
• Length: 20 feet (6 meter)

Mean Green Alternators MG1387

High Output Alternator with V-Belt Pulley for select 1999-2006 vehicles from Dodge, Jeep

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High Output Alternator with V-Belt Pulley for select 1999-2006 vehicles from Dodge, Jeep

• High output alternator
• Compatible with select 1999-2006 vehicles from Dodge, Jeep
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

shipping truck icon Free shipping in USA. Provide zip for delivery date.
$519.99

In stock.

• High output alternator
• Compatible with select 1999-2006 vehicles from Dodge, Jeep
• Easy 5-minute installation
• Up to 300% more charging power
• Precision balanced for smooth operation

Stinger SPD5101

AGU Fuse Holder with 4/8 Gauge Inputs and ShocKrome Finish

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AGU Fuse Holder with 4/8 Gauge Inputs and ShocKrome Finish

• AGU Fuse Holder
• One 4AWG Or 8AWG Input
• One 4AWG Or 8AWG Output
• ShocKrome Finish
• Set-Screw Terminals

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2
List price $19.00
-47% $9.99

In stock

• AGU Fuse Holder
• One 4AWG Or 8AWG Input
• One 4AWG Or 8AWG Output
• ShocKrome Finish
• Set-Screw Terminals

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    FAQ Frequently asked questions in Car Batteries, Power & Battery Accessories


    Car batteries, power, and battery accessories are crucial components for any vehicle.

    Car Batteries: These are rechargeable devices that store electrical energy in a chemical form, converting it into electrical power to start your vehicle's engine and power various electrical systems. They are essential because they provide the initial jolt of electricity needed to start the engine and continue to supply power when the alternator isn't running, such as when the engine is off.

    Power Accessories: These include alternators and generators, which recharge the battery and supply power to the vehicle's electrical systems while the engine is running. Voltage regulators ensure a stable supply of electrical power, preventing overcharging. Without these components, your vehicle's battery would eventually run out of power, leaving you stranded.

    Battery Accessories: These encompass components like battery terminals, cables, and connectors. Properly maintained connections are essential for the efficient flow of electrical power within your vehicle. Corroded or loose terminals can lead to poor electrical performance and starting issues.

    In summary, car batteries, power, and battery accessories are essential because they provide the electrical energy needed to start your vehicle, keep it running, and operate various electrical systems, ensuring your vehicle functions properly and reliably.

    Selecting the correct battery terminal involves considering the type of battery and the cable connection you have. First, determine if you have a top-post or side-post battery, as different terminals are designed to fit each type. Next, identify the cable size (usually stated in gauge) to ensure the terminal can accommodate the cable diameter properly. Look for high-quality materials such as copper or brass terminals, as they provide excellent conductivity and resist corrosion. Some terminals also come with additional features, like multiple connection points for additional accessories. It's crucial to choose a terminal that matches your battery and cable specifications to ensure a secure and reliable electrical connection.
    Yes, a battery disconnect switch is an effective way to prevent battery drain when your vehicle is not in use for an extended period. When the switch is in the ""off"" position, it completely cuts off power flow from the battery to the vehicle's electrical system. This prevents any parasitic draws or power-consuming devices from draining the battery during storage or inactivity. Battery disconnect switches are particularly useful for seasonal or seldom-used vehicles, such as boats, RVs, or classic cars. By using a disconnect switch, you can preserve the battery's charge and extend its lifespan, ensuring it remains ready to start your vehicle when needed.
    A battery charger or maintainer helps prolong the life of your car battery by ensuring it remains adequately charged, especially during periods of inactivity. When a vehicle is not driven regularly, the battery can gradually lose charge due to natural self-discharge and parasitic draws. Battery chargers and maintainers are designed to provide a steady and controlled flow of current to the battery, replenishing any lost charge. This prevents the battery from fully discharging, which can lead to sulfation and reduced battery capacity. Additionally, some smart chargers have maintenance modes that automatically adjust the charging rate to keep the battery at an optimal charge level without overcharging it. By keeping the battery in good condition and fully charged, a battery charger or maintainer helps extend its overall lifespan and ensures reliable performance.
    Yes, safety is essential when working with car battery accessories. Before attempting any installation or maintenance, always disconnect the vehicle's negative battery terminal to avoid accidental electrical shocks or short circuits. When working with battery terminals, wear appropriate safety gear, such as gloves and eye protection, to protect against battery acid and corrosion. Ensure all connections are tight and secure to prevent power loss or electrical hazards. When using battery chargers or maintainers, follow the manufacturer's instructions carefully and avoid overcharging the battery. Overcharging can lead to hydrogen gas buildup, which is flammable and poses a safety risk. It's also crucial to work in a well-ventilated area to dissipate any battery gases safely. If you are unsure or uncomfortable with any aspect of the installation or maintenance, it's best to seek professional assistance to ensure proper and safe operation of your car battery accessories.

    All About

    Car Batteries, Power & Battery Accessories
    Car Batteries & Power Cells: For those that are looking to install some moderate to high powered aftermarket audio equipment in their car, it is smart to supplement the vehicles electrical system with a secondary car battery or power cell. It is important to make sure that the new car audio system will not place too much stress on the electrical system. Many times, dimming lights can be a great indicator that the electrical system needs to be upgraded. A great place to start is by replacing the starting battery with a more powerful auto battery. If more power is still needed, then it is recommended that a secondary battery be installed in the car. Here you will find our selection of high performance car batteries, power cells, battery isolators, and more. To find out more about car audio batteries, power cells, isolators, call our friendly support team at 1-877-289-7664.

    Looking to enhance your car's battery performance and optimize your car audio system? Look no further! Sonic Electronix offers a wide range of top-quality car battery accessories that ensure reliable power supply and improved audio performance. Discover the best car battery accessories on this page and take your car audio experience to new heights!

    Car Battery Accessories - Empowering Your Vehicle's Electrical System

    Car battery accessories play a crucial role in supporting your car's electrical system and ensuring a smooth and efficient power flow. These accessories are designed to optimize your car battery's performance and enhance the overall functionality of your vehicle's electrical components.

    One of the primary car battery accessories is the battery terminal. High-quality battery terminals provide a secure connection between your car's battery and the power cables, reducing the risk of power loss and voltage drops. Upgrading to heavy-duty battery terminals improves conductivity, reduces resistance, and maximizes the efficiency of your car's electrical system.

    Another essential car battery accessory is the battery isolator. This device allows you to connect multiple batteries to your car's electrical system while preventing power drain from one battery to another. A battery isolator ensures that each battery serves its intended purpose and remains fully charged, making it ideal for vehicles with multiple batteries, such as RVs and marine applications.

    Expert Assistance - Your Trusted Car Audio Advisors

    At Sonic Electronix, we are dedicated to providing our customers with the best car battery accessories tailored to their unique needs. Our team of car audio experts is readily available to assist you in finding the perfect battery accessories to complement your car audio setup. Whether you need help choosing the right battery terminal or battery isolator, we have the knowledge and expertise to guide you through the selection process.

    Feel free to call us at 1-502-200-8010, and our friendly and experienced staff will be delighted to answer your questions, offer recommendations, and ensure you have a seamless shopping experience.

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    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.