KALMAR Automotive x LithiumNEXT

Electric precision for classic performance – LithiumNEXT custom battery for the KALMAR 7-97 models

Für die deutsche Version - Hier Klicken.

“KALMAR doesn’t build cars. KALMAR builds automotive dreams.” Modern restomods based on the Porsche 911 (964), combining timeless tradition with cutting-edge technology. Crafted for drivers who don’t collect cars – they live them. Whether in snow, desert sand, or the everyday – KALMAR vehicles are built to perform, everywhere. And that was exactly the starting point for our collaboration.

When KALMAR Automotive approached us, one thing became clear right away: this battery wouldn’t be just another product. It had to deliver high performance within a very limited space – and outperform many larger batteries. It had to endure temperatures from -25°C to +50°C, remain ready to go after weeks of inactivity, and handle any adventure thrown its way. Our answer was a fully bespoke solution, developed hand-in-hand with the KALMAR team.

The battery is based on our trusted A123 LiFePO4 cell technology and delivers 40Ah at a nominal 13.2 volts – all at just 6 kilograms. Compact in size, yet far more powerful than a conventional starter battery used in classic Porsche models. The custom housing was engineered to fit precisely within the tight confines of the 964 chassis, while the specially tuned BMS offers protection against deep discharge, overvoltage, and short circuits. The result: instant engine start, without the sluggish cranking often associated with older boxer engines – even after long periods of inactivity and under extreme environmental conditions.

But this battery is more than a technical achievement – it’s been proven in the real world. KALMAR Automotive put it through its paces where others would fail: Beyond Adventure Safari Range drove through Morocco, Uganda, Rwanda, South America, the Alps, across endless gravel tracks, through intense heat, sand, and relentless vibration. Just as impressive the cars were tested in the icy north of Lapland during the annual Spirit of Speed event, under sub-zero conditions. And the battery delivered – every single time.

“Turn the key, and the boxer fires up. No hesitation. No drama. This lithium battery just works.”

What excites us about KALMAR Automotive isn’t just the level of engineering – it’s the mindset. These vehicles are built from the ground up for true enthusiasts, those who seek the best of both worlds: the soul of an air-cooled classic, paired with the reliability of modern tech. That’s exactly why our battery fits their vision so perfectly. It provides the power needed – without stealing the spotlight. Lightweight. Durable. Maintenance-free. And built to be driven.

For us, this project is a perfect example of what happens when genuine passion meets precision engineering. When two partners with different perspectives but the same uncompromising standards work toward a single goal: to connect the best of the past with the innovations of tomorrow. The KALMAR 7-97 models embody the spirit of the classic Porsche 911 – raw, emotional, iconic – but take it further. And that’s where our technology comes into play. Our battery doesn’t demand attention. It doesn’t shine or roar. But it’s essential to ensuring the car feels exactly as it should in every condition: reliable, responsive, ready. Technology as a quiet enabler.

We’re already working on the next step together: a dedicated solution for the upcoming KALMAR 9X9 flagship model, based on our advanced LithiumNEXT 9XX Clubsport technology. Because when a vehicle aims to set new standards, it needs partners who understand the ambition – and deliver solutions that go beyond off-the-shelf. We build batteries that integrate seamlessly into the vehicle – as if they were made for it from the very beginning. Tailored energy solutions for automotive visions that dare to go further.

For more infos on KALMAR Automotive and their incredible cars, please visit their website: https://kalmarautomotive.com/home/