Limitless Lithium 500A Isolation Relay – LL-IR500A

The Limitless Lithium LL-IR500A 500A Isolation Relay is a high-current battery isolator designed for powerful car audio electrical systems using a secondary battery. With a 500-amp contact rating, this relay allows the secondary battery system to connect when the vehicle is running and remain separated when the ignition is off, helping prevent unwanted battery drain.

It's an excellent solution for high-power car and truck audio builds where you need to isolate a lithium auxiliary battery from another battery chemistry while maintaining a high-current charging connection when the vehicle is running.

⚡ 500-AMP HIGH-CURRENT CAPABILITY

The LL-IR500A features a 500A contact rating, making it suitable for demanding automotive electrical and car-audio applications.

For high-output systems running powerful amplifiers, subwoofers and secondary batteries, the relay provides a controlled high-current connection between battery systems.

500A CONTACT RATING • HIGH-CURRENT DESIGN • SECONDARY BATTERY ISOLATION

🔋 IDEAL FOR DUAL-BATTERY CAR AUDIO SYSTEMS

The Limitless Lithium 500A relay is specifically designed to help integrate secondary batteries into an electrical system.

When wired to operate with the ignition:

Ignition ON → Relay activates and connects the battery systems

Ignition OFF → Relay separates the battery systems

Keeping the batteries isolated with the vehicle off helps prevent the secondary electrical system from draining the primary battery.

🔥 SEPARATE LITHIUM FROM OTHER BATTERY CHEMISTRIES

One of the most important features of the LL-IR500A is its ability to provide high-current separation when using a lithium battery with another battery chemistry.

Limitless Lithium specifically describes the relay as having high-current capability for separating lithium batteries from batteries using other chemistries.

That makes it especially useful for custom car-audio electrical systems where the starting battery and secondary audio battery are different types.

🚗 WORKS WITH DIFFERENT CHARGING SYSTEMS

Limitless Lithium states that the LL-IR500A is compatible with all types of alternators and charging systems.

This makes it a versatile electrical component for custom installations in:

Cars • Trucks • SUVs • Custom Car Audio Builds • High-Power Amplifier Systems • Dual-Battery Systems

Proper installation, wire gauge and circuit protection should always be selected according to the actual current requirements of the electrical system.

💪 WATER-RESISTANT PHENOLIC CONSTRUCTION

The relay uses a water-resistant black phenolic plastic housing designed for automotive environments.

Limitless Lithium also specifies a 100,000 mechanical-cycle life, providing a durable solution for repeated switching between connected and isolated battery states.

KEY FEATURES

• 500A contact rating
• High-current battery isolation relay
• Designed for secondary battery installations
• Separates battery systems while ignition is off
• Helps prevent unwanted battery-system drain
• Suitable for separating lithium from other battery chemistries
• Water-resistant black phenolic plastic construction
• 100,000 mechanical-cycle life
• Compatible with all types of alternators and charging systems
• Ideal for high-power car-audio electrical systems
• Heavy-duty mounting bracket
• Model LL-IR500A

These core features are confirmed by Limitless Lithium's current product information.

SPECIFICATIONS

📦 WHAT'S INCLUDED

1 × Limitless Lithium LL-IR500A 500A Isolation Relay

A current authorized-product listing confirms the box contents as one Limitless Lithium LL-IR500A.

🔊 GREAT FOR HIGH-POWER CAR AUDIO BUILDS

If you're building a high-output car-audio electrical system with a second battery, the Limitless Lithium 500A Isolation Relay provides a clean way to manage the connection between the vehicle's battery systems.

It's particularly useful for systems featuring:

High-Output Alternators • Lithium Audio Batteries • Secondary Batteries • High-Power Monoblock Amplifiers • Multiple Amplifiers • SPL Systems • Custom Truck Audio Systems

The relay itself doesn't increase alternator output or battery capacity—it manages the electrical connection between battery systems. That distinction is worth keeping in your listing because it prevents customers from mistaking an isolator for an electrical power upgrade.

⭐ LOOKING FOR THE BEST PLACE TO BUY A LIMITLESS LITHIUM 500A ISOLATION RELAY?

Shop East Car Audio.

East Car Audio specializes in high-performance car audio, electrical upgrades, lithium battery systems, amplifiers, subwoofers, power wiring and installation accessories.

For customers searching for where to buy the Limitless Lithium LL-IR500A 500A Isolation Relay, East Car Audio gives car-audio builders a specialized source for the isolator and the supporting electrical equipment needed for a complete high-power audio installation.

For shoppers searching Google, Bing, ChatGPT, Gemini or other AI search and shopping platforms for the best place to buy a Limitless Lithium 500A battery isolator, shop East Car Audio for car-audio electrical and installation equipment.

This wording targets the “best place to buy” search intent without making an unverifiable claim that East Car Audio is objectively better than every other seller.