Introducing Roamer XTREME

The world's first sub-zero lithium battery

Low temperature charging
No heater required

Extreme power for extreme temperatures

The Roamer XTREME is the first lithium leisure battery that can be charged and discharged at temperatures down to minus 30 without a heater.

Military grade low temperature LiFePO4 cells
Fast charge at Minus 30 without a heater
Stable high power in any temperature

Never take a rain check on adventure

Specifically designed for the 5% who live or travel in exceptionally cold climates, our Xtreme Series allows for regular charging at very cold temperatures. Whilst perfectly suited for campervans, boats, and arctic adventures, this range is also ideal for external uses like CCTV or remote telecoms stations.

Low temperature charging

Military grade LiFePO4 cells with a special electrolyte, diaphragm, and anode materials allow fast charging at very low temperatures without causing damage to the cells due to lithium plating

No heater required

Say goodbye to cell heaters, insulation, and heat pads - our low temperature cells work seamlessly. No more stop-start charging cycles, uneven heat distribution, wasted energy or cell damage.

High power at any temperature

Cells that are capable of delivering up to 3X their capacity in continuous discharge power and 5X capacity in peak power - even at sub-zero temperatures. When other batteries fail, the Xtreme powers through.

Crossing the threshold of adventure

We wanted to see just how far we could push the limits of the Xtreme Series. And we’re thrilled to report that In a wide range of independent lab tests, it exceeded our expectations every time. It truly is an extreme battery with extreme capabilities in extreme temperatures. Check out the study below.

Sub-zero coffee date with Roamer

In the name of science, the Roamer team took a 100X battery to the coldest place we could find - a 3842m peak in the Mont Blanc Massif. We hooked it up to a solar panel, a 1000W inverter, and an induction hob, and brewed ourselves some coffee. Conclusion: The Xtreme series provides power anywhere, anytime - without fail.

The Roamer Collective

Chilling in the Alps with Valentin and Ugo

Roamer recently hung out with professional speedriders Valentin Delluc and Ugo Gerola. We joined them in Chamonix for a few days as they prepared to fly the length of the Vallee Blanche - one of the most iconic off-piste ski routes in the Alps. Check out their Roamer adventure in our short video and head to the blog for more.

Shop Xtreme Series

Easy 14 day returns

Not entirely satisfied? Send it back within 14 days for a money-back guarantee.

10 year warranty

That’s how much we believe in our product. A decade of powered adventures.

Ongoing support

We’re all about community. Reach out to us any time - we’re here to help.