Zero Power: Race-Grade, Pocket-Size 10,000mAh Power Bank
- Jul 23, 2025
- 3 min read
Just 145g and 9.9mm thin — built with forged carbon and smart power modes to go farther, faster, lighter.
FLEXTAIL, known for its innovative ultralight outdoor gear, has launched its latest game-changer on Kickstarter: ZERO POWER. This revolutionary power bank redefines portability and durability, offering a race-grade, pocket-sized 10,000mAh charge in the world's lightest and thinnest form factor. Designed for ultralight hikers, trail runners, and everyday adventurers, ZERO POWER ensures you go farther, faster, and lighter.
Project Overview
Name and Creator: ZERO POWER by FLEXTAIL (creator listed as "tommylee" on Kickstarter, representing FLEXTAIL).
What It Is: ZERO POWER is a 10,000mAh power bank engineered for extreme portability and resilience. Weighing just 145g and a mere 9.9mm thin, it's smaller than most smartphones. Its standout feature is its construction from forged carbon fiber, a material typically found in supercars and spacecraft, providing unparalleled strength and protection without the weight. It's built to keep your devices charged in the toughest conditions.
Key Features
World's Lightest & Thinnest 10,000mAh Power Bank: At just 145g (5.1 oz) and 9.9mm (0.39") thin, ZERO POWER is incredibly compact. It's designed to disappear into your trail vest, tech pouch, or ultralight kit, ensuring no bounce, no bulk, and no drag.
Forged Carbon Fiber Shell: Utilizing the same ultra-light, ultra-tough material as high-performance vehicles, the forged carbon shell is twice as strong as woven carbon and six times stronger than aluminum. This provides maximum protection for the battery core against drops, impacts, and harsh outdoor environments.
Smart Battery System with Dual Modes: ZERO POWER features an intelligent battery system that automatically switches between two optimized charging modes:
Fast Charge (22.5W): Rapidly powers up your devices, charging an iPhone 15 Pro to 50% in just 26 minutes—perfect for quick top-ups.
Smart Efficiency Mode: Squeezes out up to 30% more usable power, turning two full charges into 2.6 for an iPhone 15 Pro, maximizing endurance on longer trips.
More Usable Power: Thanks to a smart SoC chip and high-density cobalt battery, ZERO POWER delivers more usable energy than most 10,000mAh power banks, ensuring reliable performance even in cold conditions (operates down to -10°C).
Designed for Emergencies: Features an auto-stop safeguard that reserves the last 10% of battery, providing enough power for a critical call, GPS fix, or emergency headlamp use.
Pass-Through Charging: Supports pass-through charging, allowing you to charge your device while the power bank itself is being recharged. It also includes a low current mode for charging smaller devices like smartwatches (max 5W).
Weather-Ready (IPX4 Water-Resistant): With an IPX4 rating, ZERO POWER can withstand rain, splashes, and sweat, making it reliable in various outdoor weather conditions.
Integrated USB-C Lanyard Cable: A convenient, removable USB-C lanyard cable is included as a standard accessory, allowing for easy carrying and quick charging without needing an extra cable.
Digital Percentage Display: Provides a precise digital display of remaining battery percentage, offering better power management than traditional dot indicators.
Rewards
[3-Day Launch Special] Zero Power x1 ($44 USD)
[Super Early Bird] Zero Power x1 ($49 USD)
[Early Bird] Zero Power x1 ($54 USD)
[Launch Day Special] Zero Power x2 ($82 USD)
[Super Early Bird] Zero Power x2 ($92 USD)
[Early Bird] Zero Power x2 ($102 USD)
The Idea
Concept: FLEXTAIL's core concept behind ZERO POWER is to eliminate the "dead weight" of traditional power banks for outdoor enthusiasts and everyday users. They aim to provide a power solution that is not only powerful and reliable but also so light and compact that it effectively "disappears" into one's pack or pocket. The goal is to empower users to stay charged and connected without sacrificing portability or performance, especially in ultralight contexts like trail running and backpacking.
Inspiration: The founders of FLEXTAIL, a team of passionate engineers from an outdoor activity club, recognized a critical gap in the market for truly ultralight and ultra-functional outdoor gear. They believe that by significantly reducing the weight and size of essential appliances like power banks, they can remove the heavy burden on adventurers, encouraging more people to enjoy wild adventures with endless freedom. ZERO POWER is a testament to their continuous effort to innovate and set new standards in the lightweight outdoor device field, refreshing their own records with each new product.
