After Wireless charging the battery drains faster than when charging through USB.

[JamesPTao]

I did another test yesterday. This time i did not remove the phone from the pad after it charged, but left it there for the entire night. The battery seems to be doing much better, on par with wall charging. But on many sites it is recommended to not overcharge the battery and remove it from the charger when it reaches 100%. dmediamom.com/2013/04/26/rechargeable-battery-problems/ . So what the hell? What is the percentage the battery could overcharge to notice such difference? And was that what i noticed ? Overcharging from the charger vs normal 100% from the wireless pad? If so 100% with no overcharging means very poor battery life.

The warning is meant to protect the battery from damage. A connected plug can "trickle charge because of the flow of energy even though the battery is full. With qi this is not an issue because there is no direct connection and the circuit is turned off when it is full.

 

[JamesPTao]

Also if you take the phone off the qi pad when it says 100% it is actually at closer to 92%. Notice the qi charger light is still on (meaning it is still charging). When the qi pad light turns off, then it is truly at 100%.