Two working chargers, only one is charging my phone
So I have a Iphone 6 and I have two seperate working chargers. The one that works on my Iphone is a black Aye-charger, everything in one piece. The second is a brand-new standard Iphone-charger where you can unplugg the cable from the outlet thing. I can't understand why this one wont work but the Aye-charger works fine. Please help! This is a huge problem since I can't use my powerbank because this needs the removeble cord. I work as a deliveryman so I need the extra battery on the road.
Thank you for your help
iPhone 6