Bests & Worsts Reviews from Amazon

Works perfectly and I tested it to confirm voltage was OK. I test all chargers since damaging equipment with a faulty charger in the past. Experience taught me that it is not good to assume all chargers meet the USB specification. I recently ordered some dual port chargers that were junk so I followed up with an order for a couple of different highly rated ones. The junk ones looked all the world like these from the outside. It was only superficial since they were way over voltage and would be a risk to equipment. Video is my testing of the Ailkin charger, which works perfectly. The USB spec is for 5V, no higher than 5.25V and no lower than 4.4V (for USB and USB2, USB 3 can be a bit lower). Problems I've encountered are with the chargers being over-voltage. Both Ailkin dual port chargers are well within the USB specification.