That depends on where you forgot your charger and how long you will be without it. If your charger has been lost forever then buying a new one makes sense.
I would look at something much smaller. My work IT bought me one of these with my new iPhone and it also charges my work laptop and personal chromebook while they are in use. Chromebooks don't draw much power.
https://www.amazon.com/dp/B09R8TYP61...lig_dp_it&th=1