Not every pick is sold in every country. These are the things that make the difference, so you can spot the finest in your own store.
GaN means smallerGaN (gallium nitride) chargers run cooler and are far smaller than old silicon ones for the same power.
Watts by devicePhones charge at 20 to 45 W, tablets 30 to 45 W, thin laptops 45 to 65 W, big laptops 100 W or more. Check the watts per port, not only the total.
mAh is not what you getA 20,000 mAh power bank delivers roughly 60 to 70 percent of that to your phone after conversion losses.
Qi2 and Qi2.2Qi2 adds magnets and 15 W charging; the newer Qi2.2 goes to 25 W. Pick Qi2.2 where your phone and store support it.
Safety marksBuy known brands with temperature protection and real certification marks (CE, UKCA, UL). Unbranded chargers are where fires come from.