I've tested these cables on a dozen Apple and non-Apple chargers and USB-C ports. New, unpacked, both scrap. 1 cable did not charge more than 0.096 amps and never allowed 1 watt charging. Both cables will not work with most APPLE and MacBook chargers. As another reviewer mentioned. There is no electricity at all. Don't waste money. They are not compatible with most Apple chargers or even the 2019 16-inch MacBook Pro.