Why Phone Charging Is Slow. The cordcable that you are using might just be broken. Wireless charging is 70-80 efficient meaning 20-30 of the power is lost during the wireless transmission process.
One of the most common reasons your phone is charging slowly is also thankfully the easiest to fix. My USB cable is often filthy and battered. The Lightning cable charging cable you use to charge your iPhone has 8 pins and if one of those pins is clogged with dirt your iPhone may charge slowly or not at all.
If the cable connector and USB port are not in proper connect with one another then it might cause the slow charging of your android phone battery.
Cheap or damaged cable. IPhone Charging Slowly Because of Debris in the Charging Port. A good power adapter a bad USB cable will charge your phone just as slow as a bad power adapter a good USB cable. Tried several different cables and charges mine is type C and the port recognises attached cable just wont charge at the correct rate.
