Custom Lithium Ultra Slim Lithium Batteries

Reliable, High-Capacity Power for Off-Grid, RV, Marine & Solar Applications

Upgrade your energy storage with the Custom Lithium CL-US-310AH, a premium 310Ah lithium battery designed for durability, efficiency, and long-lasting performance. Built with Grade A LiFePO4 cells, this deep-cycle battery delivers consistent power for a wide range of applications—from solar power systems to caravans, RVs, marine vessels, and backup energy storage.

🔋 Key Features

• High Capacity: 310Ah of reliable power for extended use.

• Long Life Cycle: Over 4000+ cycles at 80% depth of discharge.

• Advanced LiFePO4 Technology: Safe, stable, and maintenance-free.

• Lightweight Design: Easier to handle compared to lead-acid batteries.

• Built-In BMS (Battery Management System): Protects against overcharge, over-discharge, overheating, and short circuits.

• Fast Charging: Compatible with solar chargers, inverters, and standard lithium charging systems.

• Eco-Friendly: Non-toxic and recyclable materials for sustainable energy storage.

⚡ Specifications

• Brand: Custom Lithium

• Model: CL-US-310AH

• Battery Type: Lithium Iron Phosphate (LiFePO4)

• Capacity: 310Ah

• Nominal Voltage: 12.8V

• Cycle Life: 4000–6000 cycles

• Charge Temperature: 0°C to 45°C

• Discharge Temperature: -20°C to 60°C

• Dimensions: 580mm x 370mm x 82mm

• Weight: 25Kgs

• Warranty: 7 Years

🚐 Perfect For

• Off-grid solar systems

• Caravans & RVs

• Marine applications (boats, yachts)

• Camping setups

• Backup power storage

• Commercial & industrial energy solutions

• Starlink Capable and Approved

✅ Why Choose Custom Lithium?

At Custom Lithium, we specialize in delivering high-performance, reliable lithium battery solutions engineered for Australian conditions. Our batteries are tested to meet strict quality standards, giving you peace of mind whether you’re off-grid, on the road, or out at sea.

Highest Performance.

Smallest Footprint.

STAY OFF-GRID FOR LONGER

• Made in Brisbane
• 7 year warranty
• Individually bench tested
• Lightweight aluminium enclosure

• Premium A-grade automotive LiFePO4 cells
• High current BMS
• High discharge rate
• Active balancer

Unmatched Safety & Performance

To maximise safety and performance, this battery is crafted with A-grade automotive LiFePO4 lithium cells. LiFePO4 is considered the safest type of lithium battery and is ideal for demanding environments ensuring safety and reliability.

Power That Fits Anywhere

Our Ultra Slim range of batteries was designed to fit in extremely compact spaces including behind the seats, under false floors or inside canopies. Despite this, the high current BMS and premium LiFePO4 cells ensure there is no compromise in performance.

Built to Last a Lifetime

Our custom aluminium enclosure is designed to reduce the battery's footprint and protect the cells. All components are insulated against vibration to protect your setup against corrugations and the effects of remote travel giving you confidence to explore without limits.

Built to the Highest Standard

To protect your battery we’ve equipped it with a Heltech BMS and active balancer; the BMS safeguards against overheating, over-discharge, and short-circuiting, while the active balancer maintains optimal performance by managing and protecting individual cells.

Backed to go the Distance

We take pride in the quality and craftsmanship of our batteries, which is why we offer a full 7-year warranty to give you peace of mind. Each battery is individually bench-tested so you can trust it to perform no matter where your adventures take you.

Australian Made

Certified Australian Made, our batteries are built in Brisbane and meet the highest standard of craftsmanship. Your purchase not only ensures you’re receiving a premium product but also supports the local economy and helps to keep manufacturing in Australia.