iTECH400X PRO Lithium Battery (Bluetooth) + FREE 12v Mini Control Box

Regular price $5,000 Sale price $2,999 Save $2,001
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  • Bluetooth compatibility
  • 400Ah LiFePO4 Battery
  • Drop In Replacement
  • 5-year Australian Warranty


Quick facts about the iTECH400X PRO 12v 400Ah Lithium Battery:

  • Bluetooth compatibility
  • True drop-in replacement - no need to change chargers or equipment
  • Will fit in the space of your old 200Ah batteries
  • IP67 Waterproof - perfect for external mounting
  • Only weighs 38 kg (Equivalent AGM weighs approx. 240kg)
  • 400Ah of 100% usable capacity
  • 5-year Australian warranty 
  • Australian designed and developed
  • Australian certified including IEC:62619

Introducing our all new and improved iTECH400X PRO lithium deep cycle battery with Bluetooth. As one of the most powerful 12v lithium batteries in Australia, the iTECH400X PRO was designed with Australia’s harsh climate in mind which is why this iTECH400X PRO is IP67 waterproof, suitable for high heat conditions, vibration proof, certified to IEC 62619 and backed by a 5-year Aussie warranty. 

100% Useable Capacity

Thanks to our extremely high-quality patent pending A-grade prismatic lithium LiFePO4 cells, we have been able to shrink the size of the iTECH400X PRO to the same size as many standard AGM 200Ah battery packs while having the equivalent useable power as four (4) of them combined. The iTECH400X PRO features a fully 100% useable capacity, allowing the full 400Ah (Amp Hours) to be drawn from the battery.

Bluetooth Compatibility

Never guess your batteries' health again. The iTECH400X PRO Lithium Battery now comes integrated with Bluetooth compatibility to monitor your battery's status via the iTechworld app. Download the iTechworld app on the App Store or Google Play Store.

Certified Safety

For almost 20 years iTechworld has been at the forefront of Australian lithium battery design and development. Our relentless pursuit of improvement and rigorous testing insures all our batteries surpass the highest standards. Certified to the Australian standard IEC:62619, iTechworld lithium batteries are amount the safest and most reliable options in the Australian market.

Drop in replacement

With its compact design, the iTECH400X PRO is a true drop-in replacement for your existing system. No changing of systems, chargers, or equipment is required in most cases. Simply pull out your old AGM or flooded lead-acid battery and drop in the iTECH400X PRO. It's that easy!

Prismatic Cells & BMS

The iTECH400X PRO includes an all-new patent-pending prismatic cell type, as well as an all-new supercharged Battery Management System (BMS) allowing for less cell degradation, safe and accurate operation, and a longer lifespan with high current use. With a maximum discharge current of 500A running high power appliances through a 3000W inverter such as air conditioners, coffee machines & any other creature comfort is a breeze.

 IP67 Waterproof and Dustproof

The iTECH400X PRO is waterproof and dustproof, boasting an IP67 rating. This Bluetooth lithium battery can be fully submerged in 1m deep water for up to 30 minutes and is perfect for external mounting on caravans, camper trailers and boats.


As a testament to the toughness and performance of our iTECH400X PRO lithium batteries, we have backed them up with a full 5-year Australian warranty (3 years full replacement, 2 years pro-rata).

Control your 12v system with ease 

Embrace the great outdoors with the ultimate 12V Mini Control Box , designed for adventure enthusiasts who love caravanning, camping, 4WDing, and exploring the outback. The compact size is ideal for portability, providing exactly what you require to power all your small appliances. 

Plug and Play Design

The iTechworld 12V Mini Control Box is effortlessly powered by a battery through a 50A Anderson plug.

Optional 50 Amp Anderson to Eyelets adapter will allow you to seamlessly connect the iTechworld 12V Mini Control Box to a battery if an Anderson connection is not available. 





The iTECH400X PRO warranty is 5 years (3 years full replacement 2 years pro-rata).

*Storage deep cycle battery only. It cannot be used as a cranking battery.

If your iTechworld battery enters safe mode, please follow the instructions HERE


Nominal Voltage:  12.8V
C20 Rating usable amps 10v: 400Ah
Short Circuit Protection: Yes
Optimum Temperature Range: +5 to +60°C
BMS Operational Temperature Range: -5 to 80°C
Safety Protection Isolator: 80°C
Recommended Charge Current: 1 - 100A
Maximum Charge Current: 200A 
Recommended Charge Voltage: 14.4V
BMS Charge Cut Off Voltage: 15V
BMS Low Voltage Cut Off: 8.5 - 9V
Continuous Discharge: 250A 
Peak Discharge: 500A (5 secs)
Series Connection: Up to 48V (4 x batteries)
Parallel Connection: Unlimited
Life Cycles 100%: 4000
Life Cycles 50%: 8000+
Dimensions (LxWxH): 525x240x220mm (235mm including terminals) 
Weight: 38Kg
Terminal Type: M8
Case Material: ABS
Safety Certifications:

UL Certified 1642
CE Certified
IP67 Rated
Rohs Certified
UN38.3 Certified
ISO 9001 Certified
ISO 1400 Certified
IEC:62619 Certified


Frequently asked questions about the iTECH400X PRO 400Ah Lithium 12v Battery with Bluetooth

1. How long will a 400Ah lithium battery last (how many hours)?

A 400Ah lithium 12-volt battery can last an extended period, providing continuous power for various devices. Unlike AGM batteries, which typically have a lower usable capacity, lithium batteries utilise 100% of their power capacity.

This means you can rely on the full 400Ah to power your devices, ensuring longer runtimes and enhanced performance.

2. How does the Bluetooth monitoring feature work?

The iTECH400X PRO has an internal battery monitoring system with Bluetooth, and is compatible with the iTechConnect Battery Management App. The iTechConnect app allows you to access real time key information on the current status of your battery including voltage, current capacity and temperature. For more information, download the Bluetooth App manual here. 

3. How much solar (number of solar panels) do you need to charge a 400Ah lithium 12v battery?

To charge a 400Ah lithium deep cycle battery effectively, we recommend a 2:1 ratio of solar panels to battery capacity. In this case, for every 400Ah battery, we suggest using approximately 800 watts of solar power.

Our range of solar panels, including 150-watt hard frame panels, 200-watt flexi panels, and 300-watt solar blankets, offers versatile options to meet your charging needs efficiently.

4. What size charger is best for a 400Ah lithium battery?

For charging a 400Ah lithium battery, we recommend using either the iTECHBC40 40-amp AC charger or the iTECHDCDC40 40-amp DC charger. These chargers are designed to provide fast and reliable charging, ensuring your battery is replenished quickly and efficiently.

5. What size inverter is best for a 400Ah lithium battery?

All iTechworld pure sine wave inverters are compatible a 400Ah lithium batter including the iTECH400X PRO. iTechworld inverters convert 12V DC power to 240V AC power, that allows you to power household appliances and devices using your vehicle or battery system. 

6. What can a 400Ah lithium battery power?

A 400Ah lithium 12v battery offers ample power to run various devices and appliances, making it ideal for off-grid and mobile applications. With its large capacity and high energy density, it can power a 12V fridge for weeks.

Additionally, it has enough usable capacity to support a significant inverter, allowing you to run AC appliances such as a coffee machine, air fryer, toaster, kettle, induction hot plates and everything in between.

The iTECH400X PRO could power a modern caravan air conditioner via an inverter for extended periods, typically exceeding 10 hours of runtime.

Built for the tough Australian environment, the iTECH400X PRO is IP67 Waterproof rated, allowing the battery to be submerged under one (1) metre of water for up to 30 minutes - perfect for marine applications or outdoor storage boxes. The iTECH400X PRO utilises the latest prismatic cell design offering more vibration resistance and stability for big bumps with vibration-dampening technology. 

After almost 20 years of extensive design, development, and testing, we are proud to present the 2024 iTECH400X PRO as our new flagship battery, backed by an extensive 5-year Australian Warranty. Upgrade to the iTECH400X PRO today and experience the ultimate in power and performance. 

5. Can I mount the iTECH400X PRO on its side?

Yes, iTechworld batteries can be mounted on their side, they cannot be mounted upside down.

5. How do I store my iTechworld lithium storage battery?

  • Charge the battery to a resting voltage of 13.2-13.5v.
  • Store the battery in a dry cool environment away from any moisture or humidity.
  • Check the battery voltage every 3 months and top up if required.
  • Do not store the battery in direct sunlight.