SKU: KA12120UXG2S-LION
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KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4

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$ 799 95
Reg Price $999.95
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Pay 4 interest-free payments of $249.98 with
Ultra Compact 65mm Slimline Design
Integrated Bluetooth & Remote Screen Monitoring
IP65 Dust & Water Resistant
120Ah Useable Capacity + 120A Continuous Charge & Discharge
7 Year Warranty
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KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4
Club Price
$ 799 95
Reg Price $999.95
SAVE $200

Pre-order estimated arrival date 13 November 2026

Pre-orders close in . This product will ship within 2 days of the pre-order estimated arrival date.

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7 Year Warranty

This product is covered by a 7 Year Limited Warranty.

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ABOUT THIS ITEM

At just 65mm thick, the KickAss Ultra-X 120Ah Slimline Lithium Battery is the slimmest 120Ah lithium battery on the market, packing 1536Wh of power into a design that fits behind vehicle seats and into tight spaces. With Bluetooth monitoring, 120A continuous charge and discharge, 4000+ cycles, an advanced BMS and a 7-year warranty, it's built for serious off-grid adventures.

COMPLETE YOUR SETUP

Gear compatible with KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4

Browse compatible add-ons

Chargers

Inverters

Monitors

Solar

Accessories

COMPLETE YOUR SETUP

Choose compatible add-ons for your KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4.

Quality & testing

Why Choose ULTRA-X?

Built, tested and supported by Australia’s off-grid adventure specialists.

Developed & Manufactured In-House

KickAss ULTRA-X Lithium Batteries are developed and manufactured in-house at our own battery factory, giving us complete quality control.

Tested In-House & Proven in the Field

Every KickAss lithium battery is rigorously tested in-house and in real off-grid conditions, and certified to meet the highest Australian standards.

Built for Safety & Performance

A-grade prismatic cells and an intelligent BMS deliver dependable power with integrated safety protection.

Lifetime Customer Support

Get ongoing support online, in-store, or through our Australia-wide network of 150+ installers.

KEY FEATURES

Ultra Compact 65mm Slimline Design

Ultra Compact 65mm Slimline Design

At just 65mm thick, this is the slimmest 120Ah lithium battery on the market. Tuck it behind vehicle seats, along ute tub walls or into narrow canopy compartments, leaving more room for all your other gear.
Integrated Bluetooth & Remote Screen Monitoring

Integrated Bluetooth & Remote Screen Monitoring

Keep an eye on your battery without having to access it physically. Check your state of charge, voltage, current, temperature and more through the KickAss Bluetooth app on your phone, or connect a compatible remote display for convenient monitoring.
IP65 Dust & Water Resistant

IP65 Dust & Water Resistant

With an IP65 rating, this battery is completely dust-tight and protected against water jets, making it a great choice for demanding touring and off-grid environments.
120Ah Useable Capacity + 120A Continuous Charge & Discharge

120Ah Useable Capacity + 120A Continuous Charge & Discharge

Get the full 120Ah of usable capacity, equivalent to 1536Wh of stored energy, to keep your fridge, lights, appliances and other essentials running off-grid. With continuous charging and discharging at up to 120A, it's ready to handle demanding power setups and high-current appliances.
7 Year Warranty

7 Year Warranty

Backed by a generous 7-year warranty, you're investing in a battery you can rely on for years of adventures.
Flexible Mounting Options

Flexible Mounting Options

This battery can be installed flat, upright or on its side, giving you plenty of flexibility to work around awkward spaces. Note: Should not be installed upside-down.
Supports Parallel & Series Configuration

Supports Parallel & Series Configuration

Connect compatible batteries in parallel to increase your available amp hours, or in series to increase system voltage. It's a flexible solution that can grow with your power requirements.
Advanced Intelligent BMS

Advanced Intelligent BMS

The built-in Battery Management System (BMS) looks after your battery behind the scenes, protecting against overcharging, over-discharging, excessive temperatures and short circuits. It also manages cell balancing to help keep everything running safely and efficiently.
4000+ Cycles at 80% DoD

4000+ Cycles at 80% DoD

This battery is built for the long haul, delivering more than 4000 charge cycles at 80% depth of discharge. That's years of dependable performance, even with regular use, making it a smart long-term investment for your off-grid setup.
Low Voltage Protection Override Switch

Low Voltage Protection Override Switch

Accidentally drained your battery too far? The built-in override switch lets you reactivate the BMS after a low-voltage shutdown, so you can get the battery accepting charge again without needing a separate jump-start device.
A-Grade Prismatic LiFePO₄ Cells

A-Grade Prismatic LiFePO₄ Cells

Quality starts on the inside. We've used premium A-grade prismatic lithium cells for their excellent energy density, thermal stability and consistent performance, giving you reliable power through thousands of charging cycles.
Supports AS/NZS:3001.2 Compliant Installations

Supports AS/NZS:3001.2 Compliant Installations

Planning a lithium battery installation in a caravan or camper trailer? This battery is designed to support installations that meet AS/NZS 3001.2 requirements, making it a practical choice for properly designed and installed recreational vehicle power systems.
What’s Included:

What’s Included:

  • 1 x Smart 120Ah Ultra-X Lithium Slimline Battery
  • 4 x Mounting Brackets
  • 8 x Bracket Screws

SPECIFICATIONS

Technical Details
Battery Type LiFePO4
Nominal Voltage 12.8V
Rated Capacity 120Ah
Energy 1536Wh
Max Charge Voltage 14.6V
Charge Temperature 0 ~ 60°C
Max Continuous Charge Current 120A
Discharge Temperature -20 ~ 65°C
Max Continuous Discharge Current 120A
Low Voltage Cutout 10V
Certification IEC 62619, IP65
Cycle Life 4000+ @ 80% DoD
User Manual & Support Docs
KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4
Support Page
Detailed Description

The KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery delivers serious off-grid power in an exceptionally compact design. At just 65mm thick, it's the slimmest 120Ah lithium battery on the market, designed to fit into spaces where conventional deep cycle batteries simply won't. Tuck it behind vehicle seats, inside canopies or along ute tub walls, leaving more room for all your other gear. It's an ideal solution for 4WDs, caravans, camper trailers and off-grid touring setups where every millimetre counts.

Despite its slim profile, this battery delivers impressive power and performance. With 120Ah of usable capacity and 1536Wh of stored energy, this ultra-compact LiFePO4 battery has plenty of power to keep your camping fridge, lights, fans and other 12V essentials running. It also supports continuous charging and discharging at up to 120A, making it a capable choice for more demanding off-grid power systems. Premium A-grade prismatic LiFePO4 cells deliver consistent performance, with over 4000 cycles at 80% depth of discharge for years of reliable use.

Keeping track of your power is easy thanks to integrated Bluetooth connectivity. Simply connect to the KickAss app on your smartphone to monitor your battery's state of charge, voltage, current and temperature, or use a compatible remote monitoring screen for convenient access to your battery information. An advanced intelligent Battery Management System (BMS) works in the background to protect against overcharging, over-discharging, short circuits and excessive temperatures, while a low-voltage protection override switch provides an additional recovery option if your battery shuts down.

Installation is just as flexible as the battery itself. Mount it flat, upright or on its side to suit your available space, and take advantage of parallel and series configuration support for compatible multi-battery setups. With an IP65 dust and water resistance rating, support for AS/NZS 3001.2 compliant installations and a generous 7-year warranty, the KickAss Ultra-X 120Ah Slimline Lithium Battery proves that you don't need to sacrifice valuable space to enjoy serious off-grid power.

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BOOK A 1-ON-1 CHAT WITH A 12V EXPERT

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VISIT A KICKASS RETAIL STORE

Drop into our Brisbane, Sunshine Coast, Sydney, Melbourne, or Perth stores for friendly expert advice and hands-on support.

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