This higher-end power bank is powerful enough to charge full-sized laptops as well as any tablet or smartphone. It's not exactly light, but it's certainly compact to be well suited for bags or backpacks.
https://www.notebookcheck.net/Baseus-65-W-USB-C-power-bank-with-real-time-amp-reading-now-on-sale-for-45-USD.557373.0.html
after using this powerbank for about 1 month, it suddenly doesnt charge my laptop anymore (power connected, 5 second later the power is cut with reading on baseus the baseus powerbank 20v, 0A). i can only charge my phne with it now