There are power banks that create heat, for example i have this
https://www.armed.eu/en/origin-outdoors-usb-handwarmer-powerbank-slim/
Also clothes like socks
https://www.thewarmingstore.com/collectio...
They look cool but I would most definitely recommend the heated jackets. Used one last winter and I'll never go back now.
2❤️1💚1
