Available to Order
Not sure which one? Ask us to confirm fitment first →For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. Outside the UK, shipping is shown at checkout and local customs and taxes remain your responsibility.
Some products are made to order, imported or custom built. If timing matters, contact us before ordering and we will confirm the expected delivery timeframe.
Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
| Manufacturer | ARB |
|---|---|
| Product Type | Lithium Iron Phosphate (LiFePO4) Auxiliary Battery |
| Nominal Voltage | 12V |
| Capacity | 100Ah (1280Wh) |
| Dimensions | 712 × 266 × 50 mm |
| Weight | 16 kg |
| Maximum Discharge | 200A (20 minutes) |
| Peak Discharge | 350A (5 seconds) |
| Continuous Discharge | 50A |
| Built-in DC-DC Charger | 40A |
| Operating Temperature | -20°C to +60°C (discharge range) |
| Bluetooth Monitoring | Yes (via mobile app) |
| Parallel Expansion | Supported |
The ARB Slimline 100 12V 100Ah Lithium Iron Phosphate Battery is a purpose-built auxiliary power solution designed for modern 4x4, touring, and expedition vehicles. Leveraging advanced LiFePO4 technology, ARB delivers a high-capacity, lightweight battery engineered for demanding off-road and remote travel applications where space and reliability are critical.
This slim-profile lithium battery is engineered to provide stable 12V power for a wide range of onboard equipment. Its 100Ah (1280Wh) capacity enables users to run essential gear such as portable fridges, lighting, communications, and even high-draw appliances like induction cookers or coffee machines via an inverter. The integrated 40A DC-DC charger and advanced battery management system (BMS) ensure safe, efficient charging from vehicle alternators (including smart alternators) or solar systems, making it ideal for extended off-grid use.
Traditional auxiliary batteries often require bulky mounting solutions that consume valuable cargo space. The ARB Slimline 100’s ultra-slim form factor (712 × 266 × 50 mm) allows installation in locations previously unsuitable for power storage, such as:
This flexibility is especially valuable for touring vehicles, overlanding builds, camper conversions, and expedition rigs where every centimetre counts.
The ARB Slimline 100 is designed for straightforward installation in a variety of vehicle locations. Its integrated DC-DC charger reduces the need for additional components and simplifies wiring. The battery is suitable for both new builds and upgrades to existing dual-battery systems, particularly where space is at a premium. Bluetooth connectivity allows users to monitor battery status and system health remotely, supporting confident power management on extended trips.
Remote travel demands reliable, high-capacity power without sacrificing storage or payload. Traditional lead-acid batteries are heavy, bulky, and often require frequent replacement. The ARB Slimline 100 addresses these issues with a lightweight, compact lithium solution that offers deeper discharge, longer cycle life, and real-time monitoring—helping users stay powered up and in control, wherever their journey leads.
For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.
Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.
The battery is suitable for running portable fridges, camp lighting, communications, laptops, cooking appliances, and other 12V or inverter-powered devices commonly used in touring and expedition setups.
Thanks to its ultra-slim design, the battery can be mounted behind seats, under drawers, inside canopies, or along cargo walls—ideal for vehicles with limited space.
Yes, the integrated 40A DC-DC charger allows charging from vehicle alternators (including smart alternators) and solar systems, reducing installation complexity.
Multiple Slimline 100 batteries can be connected in parallel, enabling larger power systems for high-demand builds or extended off-grid travel.
The battery features Bluetooth connectivity and a dedicated mobile app for real-time monitoring of charge status, voltage, current, and system diagnostics.
Lithium iron phosphate batteries offer higher usable capacity, lighter weight, longer cycle life, improved charging efficiency, and greater discharge capability compared to lead-acid designs.
Check dimensions, mounting points, clearance and any wiring or hose requirements against your setup before ordering.
Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.
