Not all phones support wireless charging, so find your phone model first. You will usually see “Qi wireless charging” (the default standard) or just “wireless charging” if it is.
Wireless chargers can work with cases
Most wireless chargers can charge through cases, unless it is a particularly thick case. Check the product list: there is usually a case thickness limit in millimeters. Phones can heat up during wireless charging, so don’t worry if your phone is really hot when you pick it up. Most smartphones have limits for stopping accepting a charge if they get too hot.
Cords will charge your phone faster
Some manufacturers like Apple and OnePlus make wireless chargers that charge their respective phones faster than others, but if you’re looking for speed, you’re better off sticking with a cord. Wireless charging is ideal for desks or nightstands when you don’t really use your phone or are in a rush to charge it.
There is no proof that wireless charging is harmful
You may have safety concerns or worry that the phone’s battery might degrade faster with wireless charging, but there is no evidence to that effect. Manufacturers set safety limits for phone batteries, specifying how much a battery can be charged and how much it can discharge. No matter what charging source you use, whether you connect to a wall adapter or use a wireless charger, these limits cannot be overridden. There is no risk of overcharging your phone by leaving it on a wireless charger overnight.
However, try to keep your battery between 50-80% for optimal battery health. Keeping your phone fully charged or fully discharged the battery will degrade it slightly faster, and regularly switching between full and empty will shorten its life. Battery technology has improved in recent years and phone batteries are more reliable than ever. If you change your phone every two to three years or don’t mind paying a modest charge for battery replacement at this timescale, then it’s not worth worrying too much about how often or the moment you charge your phone.