Interview about Voltbox Speaker Charging Station, winner of the A' Digital and Electronic Device Design Award 2021
The design blends style and functionality in one speaker charging station, with two retractable charging cables for Android and iOS devices and two fast-charging usb ports. While the user shares the charging station with someone, at the same time, enjoy some music while catching up with their friends, anywhere one wishes to be. Voltbox is a power bank that works indoors and outdoors, remaining a companion to be connected on and offline.
View detailed images, specifications, and award details on A' Design Award & Competition website.
View Design DetailsOne of the main goals of technology, in our view, is to bring people closer together. It should make our daily lives easier, allowing us to save time and focus on what truly matters—sharing moments with family and friends. However, while digital connectivity through social media keeps us in touch with loved ones far away, it often distances us from those right beside us.With Voltbox, we wanted to address that paradox. The design integrates functionality—charging multiple devices—with a social purpose. By combining a speaker and a communal charging station, we created a product that naturally encourages people to gather, talk, and share experiences while their devices recharge. Every design decision, from the layout and lighting to the tactile materials and sound quality, was guided by this vision of togetherness. Voltbox transforms a simple, routine task into an opportunity for connection, helping people reconnect in the real world.
Balancing a compact, portable form with a 10,400 mAh battery capacity was one of the key engineering challenges we faced during development. We wanted Voltbox to be powerful enough to charge multiple devices and deliver high-quality sound, yet still lightweight and easy to carry or place on any surface.Achieving this required careful optimization of every component—from the battery cell arrangement and energy management system to the thermal design and material selection. We worked extensively on improving power efficiency, ensuring that the charging circuitry and speaker modules could perform at their best without generating excess heat or draining power unnecessarily.Through iterative prototyping and testing, we refined the internal architecture to maximize capacity within minimal space. The result is a balanced design that delivers strong performance and long-lasting power, while maintaining the sleek, portable aesthetic that defines Voltbox.
The retractable cable system was born from a simple observation—charging stations often end up cluttered with tangled cables, which disrupts both functionality and aesthetics. Our goal was to design a clean, intuitive solution that would make charging effortless and visually pleasing.We began by exploring existing cable management mechanisms, but none met our standards for durability, compactness, and user experience. This led us to develop our own system from scratch. The process involved countless prototypes, testing different spring tensions, spool geometries, and cable materials to ensure smooth retraction without compromising longevity.The result is a retractable system that combines precision engineering with user-centered design. It not only keeps the charging area organized but also enhances the overall experience—turning what used to be a small annoyance into a seamless, elegant interaction.
User behavior research played a crucial role in determining the placement and accessibility of the four charging ports. From early observation studies, we noticed that when people gather—whether at home, in cafés, or shared workspaces—they naturally cluster their devices in the center of the table or within easy reach. However, conventional charging setups often create awkward cable overlaps or force users to move around to find available ports.To address this, we designed the Voltbox with four evenly distributed ports around its perimeter, ensuring that everyone can connect their devices comfortably from any side. We also considered factors like cable length, viewing angles, and how people interact while their devices are charging, making sure the setup encourages conversation rather than clutter.This human-centered approach helped us create a product that feels intuitive and social by design—one that not only powers devices efficiently but also supports genuine connection among users.
Achieving UL certification was a critical milestone for us, as safety and reliability are at the core of Voltbox’s design philosophy. Meeting these stringent standards while preserving the product’s compact and elegant form required close collaboration between our engineering and design teams from the very beginning.We carefully selected high-quality, heat-resistant materials and optimized the internal layout to ensure proper insulation, ventilation, and component spacing—without increasing the overall footprint. Every detail, from circuit protection and power management to the design of the charging ports, was engineered to meet UL’s rigorous testing for electrical safety and performance.Throughout the process, we refused to compromise on aesthetics. Instead, we treated the safety requirements as a design challenge—integrating them seamlessly into the product’s minimal, modern appearance.
Selecting polycarbonate as the primary material was a deliberate choice that balanced strength, aesthetics, and manufacturing efficiency. We needed a material that could withstand daily use, impacts, and heat from continuous charging while maintaining a sleek, refined look.Polycarbonate offered the ideal combination of durability and lightness, ensuring Voltbox remains portable yet robust. Its excellent molding properties also allowed us to achieve precise detailing and consistent quality during production, reducing waste and assembly time.
Voltbox began as a charging solution for restaurants, designed to let guests power their devices conveniently while socializing. As we observed how people interacted with it, we realized its potential extended far beyond public spaces—users wanted the same seamless experience at home, in offices, and on the go.This insight drove a complete design evolution. We refined the form factor to be more compact and portable, enhanced the speaker quality for personal use, and introduced features like the retractable cable system to keep spaces tidy. The aesthetics were also softened to fit comfortably into both professional and domestic environments.In essence, the shift from a commercial to a personal context inspired a more human-centered approach—one that prioritizes flexibility, style, and everyday usability while preserving Voltbox’s original social spirit.
Balancing battery allocation between charging and audio performance was one of the most complex aspects of Voltbox’s development. We wanted users to enjoy extended playback—over 18 hours—without sacrificing the ability to charge multiple devices efficiently.To achieve this, we implemented a smart power management system that dynamically distributes energy based on usage. When the speaker is active, power delivery to charging ports is optimized to preserve audio quality and battery life; when idle, more energy is directed to charging.Through careful tuning of the circuitry and extensive testing, we ensured both functions operate harmoniously, giving users long-lasting performance and reliable power in a compact form.
Our research into mobile device usage patterns showed that people rely heavily on their phones for multiple applications—streaming, navigation, communication, and productivity—which rapidly drains battery life. However, most users don’t consistently carry chargers or portable speakers, and often lack access to power outlets when they’re out in public.This insight highlighted a clear opportunity: the need for a convenient, portable, and multifunctional charging solution that fits seamlessly into everyday life. The Voltbox Speaker Charging Station was designed to meet that need by combining powerful charging capabilities with a wireless speaker in a compact, user-friendly design that can be placed in public areas, offices, or travel spaces. It offers both entertainment and essential charging access—a combination driven directly by observed user behavior and pain points.
I see Voltbox evolving from a single-purpose charging speaker into an intelligent, modular, and sustainable hub: faster and smarter charging (for many devices at once), seamless connectivity and payments for public deployments, improved portability through swappable batteries, and greener power options like integrated solar and energy-recovery — all driven by advances in battery, wireless power, and AI-based power management.
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