Powerbox is a portable, high-capacity battery that charges up to four small devices simultaneously via one USB-A and three USB-C ports. It provides nearly 250Wh of energy, keeping laptops and smartphones powered for up to 8 hours. The device can be recharged overnight in a Powertray or through mains power. Made from recycled plastic, it uses lithium iron phosphate batteries, which are less hazardous and easier to recycle. The design ensures easy recognition, return, and maintenance, supporting sustainability through serviceability and recyclability.