Chargers and cables both can make a difference.
I had to make up a "special" lead for my iPad so that it would charge properly after the Apple charger disappeared and I tried to use a different 2 amp one. The iPad needs specific voltages on the inner pins - easily fixed once you know. The genuine Apple charger does it inside the charger; a fudged lead will achieve the same.
"Wall warts" that cause interference are likely to have other problems. I bin them and make a note not to use that brand again. 12 volt input ones that make a noise get taken into my radio shack and fixed.