I've had a Samsung Galaxy S3 for a few years, I even upgraded to a newer model, and revered back to my trusty ol' S3 because I missed it, and was and was happy with it's size & features.

Eventually the USB charge port stopped working (a common problem on this model). Replacement part is under $2 but microsoldering & board repair are beyond my skill level, so I got a 2nd battery + external charger, which I've been swapping out twice a day for six months.

It's a bit of a pain, so when I realized Qi-style Wireless Charging could be inexpensively "retrofit" to my device, I was thrilled!

The transmitter & receiver pad arrived yesterday. I placed the pad under the battery cover as instructed (touching the previously-mysterious 2nd set of charging contacts), put it on the transmitter, and voilà, my charging headaches were solved! It charged faster than plugging it in [used to], and even worked with my rubber case attached.

Hooray! Until the next day. :-(

Today the phone does not detect the wireless charger. I've tried restarting the phone repeatedly, tried two batteries on each of two receiver pads (they accidentally sent 2 instead of 1), tried with/without case & cover, and even different power sources & cables to the transmitter.

None of these steps worked which leads me to believe this is a software problem... Is that possible?

If I can't get it working I'm obviously going to send the parts back and go back to constantly swapping batteries but I'm hoping someone has a suggestion. Could there be settings I am unaware of?

When working, Ampere Meter app said it was charging wirelessly at 1050mA. Receiver pads are rated for 800Ma; Batteries are 3.87v/7.98/Wh/2100mAh. As I recall it would charge around 650mA back when the charge port worked.

Photo is similar receiver pad, on same model of phone:

Wireless Charging Receiver Pad Installation on Samsung Galaxy S3

Samsung Galaxy S3, rooted (with no other issues), running Kitkat 4.4.4.
  • Couldn't you just take your phone to a service centre? – Wrichik Basu Nov 26 '17 at 14:35
  • Warranty was gone a long time ago. The goal is to not spend any money, and to keep my existing phone. After trying all the hardware combinations I could think of, I was hoping there might be something software-related I could try. – ashleedawg Nov 26 '17 at 15:11

Oddly, my receiver (NillKin) stopped charging the phone on the same day as yours did. I have a Pixel XL (Android 8) & this solution worked great! ...until it didn't. Try turning the phone off & see if it will charge. Mine still will, but only if turned off. I do notice that I have to be more precise with placing it on the pad than I used to. Only thing I can think of electrically that matches the symptoms would be if there are multiple wires used in the loop & one is either shorted or ground. ??? Anyway, I ordered another one that should be here in a couple of days.

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