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Small in size big in impact, the Survival - Grade Zero Power Energy Bank is a handy pocket sized power bank with smart energy charging.
We are unable to use our standard shipping services for Power Banks. Therefore, all power banks will be shipped by DPD Local (Next Working Day Tracked). Unfortunately, we are unable to send power banks outside the UK.
Flextail says:
In the backcountry, weight isn’t just a number—it’s how far, how fast, and how free you move. And when power fails, you don’t just lose a phone—you lose navigation, safety, and connection.
That’s why we made Zero Power, the world’s lightest and thinnest 10,000mAh power bank, built for ultralight hikers and trail runners. At just 145g (5.1 oz) and 9.9mm (0.39") thin, it’s lighter than your phone—and even lighter than three energy gels (60g / 2.1 oz each). Race-legal and vest-ready, it disappears in your pack—until you need it most.
A custom-designed, ultra-compact USB-C LED — built just for Zero Power. Featuring a top-tier LED chip, it delivers 35 lumens at 0.5W with a 10,000-hour lifespan. While USB-A strips are everywhere, true USB-C versions are rare.
From shoes to headlamps, trail athletes cut every gram. But power banks? They’re usually dead weight.
With a compact body, it’s 55% smaller than standard bricks in this category. That’s serious savings in your vest, and serious freedom on the trail. No bounce. No bulk. Just clean, pocket-sized power.
Zero Power is built with forged carbon fiber—a premium material used in supercars and spacecraft, now brought to trail gear. Unlike aluminum, forged carbon is compression-molded from short fiber bundles, delivering exceptional strength at ultra-low weight.
Our Verdict
The Flextail Zero Power Energy Bank delivers a strong balance of capacity and portability. Weighing just 142g with a 10,000mAh capacity, the slim profile will trim down the size of your electronics pouch. Charging performance feels dependable, with a fast mode for quick boosts and a smart efficiency mode that helps stretch battery life.
The forged carbon shell feels solid, while the dual USB-C ports add flexibility for charging multiple devices. A well-considered ultralight option that prioritises practical trail usability.
- Reviewed by Ultralight Outdoor Gear
Features
- Just 145g and 9.9mm thin — built with forged carbon and smart power modes to go farther, faster, lighter.
- Uses a smart SoC chip and high-density cobalt battery to deliver more usable energy in every charge. With 95% voltage boost efficiency and up to 30% less power loss, it performs reliably even in cold, overnight treks.
- Offering two modes: Fast Charge for quick boosts, and Smart Efficiency to stretch power longer
- Features an auto-stop safeguard that locks in the last 10% of battery
Specifications
- Weighs: 142g
- Dimensions: 122x68x10mm
- Battery Capacity: 10000mAh
Material & Construction
- Material: Forged Carbon Fibre Shell
- Waterproof Level: IPX4
- Charging: Dual USB-C Port
