If you're looking for a charging block, power and ports matter. For fast charging (iPhone 8 onwards), you’ll need 18W or more and USB-C, not the older, more common USB-A.
Meanwhile, when choosing a charging cable, durability is key. Nylon braiding reduces tangling; look for reinforcements where the cable meets the connector, as that’s where cables tend to fray.
Finally, if you want a wireless charger, it's worth bearing in mind that many wireless chargers deliver 5W. That's fine for overnight charging, but if you want something faster, a 7.5W option charges faster.