During pandemics, people increasingly go outside and require electricity for heating, lighting or cooking. Portable power sources are a great option, as they also minimise greenhouse gas emissions. The compact, red and black Bastro power supply uses upcycling to achieve this. Discarded lithium-ion batteries from electric vehicles are used for storage purposes. The result is a lightweight energy storage unit that supplies DC electricity and, with the help of a DC/AC inverter, AC electricity as well.