Garage
Shop

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.

Top sellers

Loading...
filter-icon Filters & Sort

XS Power 580

Pair of 12 Volt Short Brass Battery Terminal Post Adapters M6

580 big
Go to item page Right Arrow Icon of Right Arrow

Pair of 12 Volt Short Brass Battery Terminal Post Adapters M6

• Pair of 12-Volt Short Brass Terminal Post Adapters
• For Vehicles that Use "Short Style" Battery Posts
• High Quality M6 Threading
• Stainless Steel Hex-Head Bolts Included
• Compatible with All i-BAR Rails

shipping truck icon Free shipping in USA. Provide zip for delivery date.
28
List price $19.99
-25% $14.99

In stock

• Pair of 12-Volt Short Brass Terminal Post Adapters
• For Vehicles that Use "Short Style" Battery Posts
• High Quality M6 Threading
• Stainless Steel Hex-Head Bolts Included
• Compatible with All i-BAR Rails

JL Audio XB-SPTM Side-Post Battery Terminal Adaptors

1 Pair Side-Post to Top-Mount Battery Terminal Adapters

XB-SPTM big
Go to item page Right Arrow Icon of Right Arrow

1 Pair Side-Post to Top-Mount Battery Terminal Adapters

• 1 Pair (1 negative, 1 positive) of. Side-Post to Top-Mount Battery Terminal Adapters
• Forged and machined brass construction
• Marine-grade, anti-corrosive Stannum plating

shipping truck icon Free shipping in USA. Provide zip for delivery date.
2
$19.99

In stock

Only 1 Left!

• 1 Pair (1 negative, 1 positive) of. Side-Post to Top-Mount Battery Terminal Adapters
• Forged and machined brass construction
• Marine-grade, anti-corrosive Stannum plating

Metra IBR146

SAE Top Post Battery Terminals (Sold as Pair)

IBR146 big
Go to item page Right Arrow Icon of Right Arrow

SAE Top Post Battery Terminals (Sold as Pair)

• SAE Top Post Battery Terminals
• Pair of positive or negative battery clamps
• Top-mounted or side-mounted options
• Machined brass construction with satin chrome finish

shipping truck icon Free shipping in USA. Provide zip for delivery date.
List price $53.99
-11% $47.99

In stock

• SAE Top Post Battery Terminals
• Pair of positive or negative battery clamps
• Top-mounted or side-mounted options
• Machined brass construction with satin chrome finish

Rockford Fosgate RFDGM

GM Battery Post Extender

RFDGM big
Go to item page Right Arrow Icon of Right Arrow

GM Battery Post Extender

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

shipping truck icon Free shipping in USA. Provide zip for delivery date.
2
$9.99

In stock

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

Stinger SPT55309

PRO Series Classic Long GM Battery Post w/ Shoc-Krome Plating (Positive or Negative)

SPT55309 big
Go to item page Right Arrow Icon of Right Arrow

PRO Series Classic Long GM Battery Post w/ Shoc-Krome Plating (Positive or Negative)

• Provide maximum current transfer
• Chrome finish
• Deep wire recesses
• Oversized set screws

shipping truck icon Free shipping in USA. Provide zip for delivery date.
4
List price $19.00
-32% $12.99

In stock

• Provide maximum current transfer
• Chrome finish
• Deep wire recesses
• Oversized set screws

SHURiKEN SK-SAE35-100

2 Pair of SAE Posts with M6 for Select Shuriken Batteries

SK-SAE35-100 big
Go to item page Right Arrow Icon of Right Arrow

2 Pair of SAE Posts with M6 for Select Shuriken Batteries

• One Pair of Long and One Pair of Short SAE Posts for SK-BT35 thru SKBT100
• Posts with M6 that has 15mm and 27.5mm Posts
• Two Sets

shipping truck icon Free shipping in USA. Provide zip for delivery date.
5
List price $39.99
-10% $35.99

In stock

Only 2 Left!

Stinger SPT55310

Side Post Adapter for Select Stinger Batteries

SPT55310 big
Go to item page Right Arrow Icon of Right Arrow

Side Post Adapter for Select Stinger Batteries

• Side Post Terminal Adapter
• Brass Construction and Finish
• Plastic Insulated Conductors
• Compatible with Most Stinger Batteries

shipping truck icon Free shipping in USA. Provide zip for delivery date.
2
List price $109.00
-58% $45.99

In stock

Only 2 Left!

• Side Post Terminal Adapter
• Brass Construction and Finish
• Plastic Insulated Conductors
• Compatible with Most Stinger Batteries

SHURiKEN SK-SAE20

Pair of SAE Posts with M5

SK-SAE20 big
Go to item page Right Arrow Icon of Right Arrow

Pair of SAE Posts with M5

• One Pair of Long and One Pair of Short SAE Posts for SK-BT20*
• Posts with M5 that has 12mm and 24.5mm Posts
• Two Sets

shipping truck icon Free shipping in USA. Provide zip for delivery date.
4
List price $39.99
-10% $35.99

In stock

Only 2 Left!

• One Pair of Long and One Pair of Short SAE Posts for SK-BT20*
• Posts with M5 that has 12mm and 24.5mm Posts
• Two Sets

Stinger SPT55308

PRO Series Classic Short GM Battery Post Shoc-Krome (Positive or Negative)

SPT55308 big
Go to item page Right Arrow Icon of Right Arrow

PRO Series Classic Short GM Battery Post Shoc-Krome (Positive or Negative)

• Provide maximum current transfer
• Chrome finish
• Deep wire recesses
• Oversized set screws

shipping truck icon Free shipping in USA. Provide zip for delivery date.
8
$12.99

Available

Ships in 10-14 days

• Provide maximum current transfer
• Chrome finish
• Deep wire recesses
• Oversized set screws

Rockford Fosgate RFDGML

Platinum Plated Long GM Battery Post Extender For Double Stacked Terminals

RFDGML big
Go to item page Right Arrow Icon of Right Arrow

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

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

T-Spec VGMS

GM Standard Battery Terminal Post For GM Side Post Style Batteries

VGMS big
Go to item page Right Arrow Icon of Right Arrow

GM Standard Battery Terminal Post For GM Side Post Style Batteries

• GM Standard Battery Terminal Post For GM Side Post Style Batteries
• Solid Brass Construction
• High Tolerance Compact Molded ABS
• Water Resistant

shipping truck icon Free shipping in USA. Provide zip for delivery date.
3
List price $14.99
-13% $12.99

In stock

Only 3 Left!

• GM Standard Battery Terminal Post For GM Side Post Style Batteries
• Solid Brass Construction
• High Tolerance Compact Molded ABS
• Water Resistant

Reikken TPB-6M

Brass top posts pair - 6mm screw

TPB-6M big
Go to item page Right Arrow Icon of Right Arrow

Brass top posts pair - 6mm screw

• Brass Top Post Set for All Batteries with 6mm Insert Threads

shipping truck icon Free shipping in USA. Provide zip for delivery date.
List price $18.99
-21% $14.95

Available

Ships in 10-14 days

• Brass Top Post Set for All Batteries with 6mm Insert Threads

    Clear all

    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.

    why-shoping-with-sonic

    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!
    Why Shop With Us?
    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    2007 Audi Q7

    2014 Ram 3500

    2003 Volvo XC70

    1998 Isuzu Trooper

    2004 Infiniti G35

    2008 Nissan Versa

    1995 Mazda MX-6

    2013 BMW X5 M

    2016 Nissan Leaf

    2017 Dodge Durango

    Vehicle
    Store
    Delete

    2021 Harley Davidson FLRT Freewheeler

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon

    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.