charger problem

when you switched to another charger, did you switch the cable as well? try not to use Samsung cable, I swapped the cable with an OEM but retain the same Samsung charger, my phone can now be charged normally

if you can get a hand on a non-Samsung cable, give it a try. I have personally tested S3 own charger, another S3 charger, and both failed me until I swapped the cable to an OEM cable. the cable failed me as well when I used it as car charger, but it was ok when I swapped it with my old Nokia 5800 data cable. now that Samsung cable is just lying in my office's drawer as back up

Cable or adaptor..

flagship model, broken charger I owned another Samsung phone before this, Samsung Harmonix, and it was broken in some way as well. I love the phones but the QC has to be improved 
do let us know if that fixes the problem

6% increase? so the cable is the culprit then 

i noticed that too.. kill it from task manager, restart and voila, it came back.. haha..

Will use for at least 2 years. Galaxy S4 failed to excite, and most importantly, I am not in the money printing business
You can keep your Samsung cable as back up, like what I do