Review on 85W T-Tip Power Adapter for Mac Book Pro/Air with Retina Display, mid-2012 onwards – Replacement Charger by Pauly Blake

It may be a lot cheaper than an Apple certified charger, but there's still a reason it's cheaper.... It makes a static noise when connected to a laptop. and it overheats. Do not use it to replace the original that came with your laptop. Use it ONLY IN AN EMERGENCY. Buy an APPLE CERTIFIED charger there for a reason. looks the same but it isn't...