What is the best alternative to Anker's PowerPort+ 5?
If you own a laptop that is bigger than 13 inches, you should definitely check if the wattage of this adapter is high enough for your computer. It wouldn't be able to replace a charger with power output over 45 W, so it won't charge a 13-inch MacBook Pro, for example. See More
You will not be able to use NuPower as a replacement for a more powerful adapter. For example, if you use it on a 15-inch MacBook (2016) instead of the original 87 W charger, it will at best prevent the battery from draining, but not increase the charge. See More