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.

WHAT'S INCLUDED?

Everything that is included in this KickAss kit!

KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4 - Series 2
2 x KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4 - Series 2

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.

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.

7 Year KickAss Warranty

This product is covered by a 7 Year Limited Warranty. Learn more.

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KickAss Battery Linking Cables - 2AWG, 400mm
1 x KickAss Battery Linking Cables - 2AWG, 400mm

These 400mm linking cables allow you to connect batteries in series or parallel to build a battery bank, increasing your power capacity. 12V, rated to 100amps. Appropriate for 4WDs & light commercial vehicles.

400mm Length Pair (Black & Red) Battery Joiner Pack

Combine batteries in parallel to create a battery bank and boost your power storage capacity. These cables can also be used in series to achieve 24V from two 12V batteries.

Note: Always ensure your batteries are connected correctly for your intended application.

1 Year KickAss Warranty

This product is covered by a 1 Year Limited Warranty. Learn more.

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SPECIFICATIONS

Technical Details
KickAss Battery Linking Cables - 2AWG, 400mm
Length 400mm
Voltage 12V
Current Rating 100 Amps
Cable Size 2 AWG
Lug Hole Size 8mm
KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4 - Series 2
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
Dimensions without Brackets 46 cm (L) × 6.5 cm (W) × 30 cm (H)
Dimensions with Brackets 50.1 cm (L) × 6.5 cm (W) × 36 cm (H)
User Manual & Support Docs
KickAss Smart 12V 120Ah Ultra-X Lithium Slimline Deep Cycle Battery LiFePO4 - Series 2
Detailed Description

Boost your off-grid adventures with the KickAss Twin 12V 120Ah Ultra-X Lithium Battery Bundle, complete with high-quality linking cables. Designed with the rugged Australian terrain in mind, this powerful bundle ensures your setup remains energised and reliable. Featuring our best-in-class 12V 120Ah Ultra-X Slimline Deep Cycle Batteries, known for their exceptional durability and performance, this bundle is perfect for powering multiple devices while on the go. The included 2AWG, 400mm linking cables guarantee seamless connectivity between the batteries, making this bundle a smart choice for those seeking robust and reliable power solutions.

FIND A KICKASS INSTALLER

Need a hand installing your KickAss gear? Find approved installers in your local area.

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

Got questions about your off-grid power setup? Book a consultation with one of our 12V experts.

VISIT A KICKASS RETAIL STORE

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