The latest range of 135Ah lithium (LiFePO₄) deep-cycle batteries are the most reliable, technologically-advanced batteries we have ever manufactured. With Bluetooth® monitoring, outstanding performance characteristics and full international certification, you’ll never be caught short of 12v power on your 4wding and camping adventures again! Best of all, we’ve packed 135Ah of usable power into a standard Group 27 (N70) size case, meaning they are compatible with standard-sized battery boxes and trays.

This model includes our latest innovation: the cells are wrapped in heating film, which is automatically switched on by the BMS when it detects the ambient temperature has dropped under 0°C. This means that, unlike other batteries on the market, you can continue to charge your battery even in freezing weather!

These batteries are made using best-in-class robotic manufacturing processes with rigorous quality assurance (including serialised tracking) and pre-shipment cycle testing. We even store the test report for each battery for later reference if needed. That’s why we can now confidently offer you a 5-year Australian warranty.

In the past, people who went camping or 4wding in very cold weather knew to avoid charging their deep-cycle batteries if possible, and if they really needed to charge them, to do so at a much lower rate than normal.

All that has now changed with the introduction of our Cold Climate Lithium Batteries. These batteries contain a BMS-controlled heating film which will gently heat the cells when the battery detects the ambient temperature has dropped below 0°C, ensuring that the cells remain in the optimum charge temperature range. This means you can charge them as normal at ambient temperatures as low as -20°C.

The process is fully automatic, meaning you don’t have to think about turning on and off the cell heating and can focus on having a good time instead!

The 

135AH deep-cycle lithium batteries are constructed from the highest quality 26700 high-discharge cylindrical cells. The cells are carefully matched to ensure the difference in internal resistance is less than 1mΩ and voltage difference is less than 5mV. They are then ultrasonically welded using automated equipment to ensure a strong connection is made between each cell, and encased in custom-molded ABS plastic cell holders to ensure reliability and consistency even when subjected to shock and vibration.

Wait… aren’t prismatic cells better?

Prismatic and cylindrical cells both have inherent advantages and disadvantages. Batteries which use prismatic cells are somewhat lighter than those with cylindrical cells, and are easier to manufacture due to having fewer connections between cells. Cylindrical cells, on the other hand, are usually more efficient in their energy usage, produce somewhat less heat and tend to be more reliable than their prismatic counterparts.

The improved cell reliability and efficiency of cylindrical cells are what made us decide, like Tesla and Rivian, to manufacture these batteries from cylindrical cells.

Hardkorrs lithium batteries have been certified as meeting all required and optional international standards for performance and safety, including:

• UN 38.3: Safety testing of lithium metal / lithium ion batteries in transport
• UL 1642: Performance/quality testing to guard against risk of fire or explosion
• IEC 62133-2:2017: Safety testing of portable lithium batteries under intended use and reasonably foreseeable misuse (including vibration test)
• IEC 62619:2017: Safety testing of lithium batteries for industrial use
• CE: The batteries meet EU safety, health and environmental protection requirements

In addition, our manufacturing facility has been certified in accordance with the following international standards:

• ISO 9001: Ensures quality management systems have been implemented
• ISO 14001: Ensures environmental management systems have been implemented
  
  This battery give you the capability to easily monitor its key data wirelessly, via Bluetooth® connection. You can access this feature by downloading the Hardkorr Battery app which is available for iOS® and Android® devices.
  The app also records a log of any instances where a BMS protection circuit is activated, including over-charge, over-discharge, under-voltage, over-current and over-temperature. You can find it by pressing the shield icon in the top-right corner of any screen.

The Battery Management System (BMS) inside all lithium batteries contains a protection circuit which trips if the voltage drops below a certain setpoint. In the case of Hardkorr batteries, it is set at 10.0V. This circuit prevents damage to the battery by putting it into a ‘sleep’ mode until it is reset.

In the past, resetting the battery after the over-discharge protection was activated was not easy. Whilst some battery chargers do contain a “wake-up” function, most people had to resort to applying a constant voltage above 12V across the terminals using jumper leads or home-made wires. This was fraught with danger; damage to appliances or the battery were not uncommon.

Our batteries provide an easy solution to this problem; simply connect our included remote reset switch to the socket on the top face of the battery and hold down the button for 5 seconds, and the over-discharge circuit will reset itself. The button can also be flush-mounted into your 12v setup if desired.

Why go lithium?
 

• Long cycle life: lasts up to 10x longer than Sealed Lead Acid (SLA) batteries
• More usable capacity: safely use up to 70% of usable capacity and 99% in an emergency (vs 50%/70% for SLA)
• Light weight: About half the weight of an equivalent SLA battery
• Environmentally friendly: Non-toxic, contains no acid, can be installed in any direction

Specifications

* Note on discharge current: if you connect multiple batteries in parallel, the maximum discharge current is multiplied by the number of batteries in the array. For example, if you connect two of these batteries in parallel you can discharge at up to 270A.