12 W / 2.4 A wall charger for Samsung Galaxy S3
I own a Samsung Galaxy S3 and lost the cable I got with my phone. Hence I had started using another random cable with the same adapter. After a year, my phone started charging really really slow. Like, 60% in 8 hours. I tried changing the adapter as well as the cable, but the issue persisted.
I then purchased a 2 Amp travel charger from Best Buy and it worked fine for a couple of days. After that, it started charging really slow again.
I have now purchased a 12 W/ 2.4 Amp wall charger from Best Buy. It charged really fast. Although, I fear my phone will blast or something. So I tried the new cable with a friend's 1 amp adapter and it still charges fine.
Does the cable really matter? Can I purchase a 1 amp adapter and a new cable and expect it to work fine? or is it safe using my new 2.4 amp adapter?