Bests & Worsts Reviews from Amazon

I have been using the Photive 25 Watt 5 Port USB Desktop Rapid Charger for over a year and liked it very much. The only problem is that its total output current is limited to 5 Amp. So in case all five devices demand maximum charging current at the same time (such as right after a power outage), the Photive charger can get stuck in hiccup mode due to over-current protection. That's why I wanted to try this Anker 60W 6-Port USB Charger PowerPort+ 6, which claims to supply up to 12 Amp total output current. Prior to this purchase, I tried a similar product (AmazonBasics 60W 6-Port USB Charger) but was disappointed by it. See my review on it for details: http://www.amazon.com/review/R1QSV9UMTCNVRP/ [Physical Appearance] See my uploaded picture for size comparison between Photive, AmazonBasics and Anker chargers. Basically they all have the same design, just with progressively larger cases. Note that AmazonBasics is the only unit with an LED indicator for AC power. [Output Currents] The Anker unit has 5 “PowerIQ” ports, each rated up to 2.4A, plus one “Quick Charge 2.0” port. When charging my B&N NOOK HD+ Tablet from any port, the Anker unit supplies 5.09V 1.94A, which is the same level as with the original Nook AC charger. In contrast, the AmazonBasics unit charges at lower voltage of 4.78V and current of 1.80A When charging my Lenovo IdeaTab A8-50 Tablet, the Anker unit provides 5.15V 1.14A, while the AmazonBasics unit provides 4.88V 1.10A The above results show that the Anker unit has a well designed power regulator inside. A good USB regulator should hold the output voltage slightly above 5V, to counter the i*R voltage drop caused by USB cable. The AmazonBasic unit, on the other hand, is barely able to stay in the 5V +/-5% range when delivering just 1.8A [Maximum Power] I connected six of my heaviest drain USB devices: tablets, cell phones, power banks, etc. All devices were intentionally drained to below 50%. The input power (as measured by my EUM-A1 Power Usage Meter) jumped up to 60W, which implies the total output current is close to 12A. After 30 minutes at this maximum power level, the unit became just slightly warm to the touch. That implies the efficiency of the convert must be very high, probably over 90% Unlike the AmazonBasics charger, this Anker unit is nearly silent except for a slight humming sound, audible only when I put my ear right on the case. [Standby Power] The Anker unit consumes just 0.3W of power when no USB devices are connected. This is the same power consumption as Photive and AmazonBasics units. That means all three units are Energy Star compliant. [Room for Improvement] The only feature I miss is an AC power indicator for the Anker unit. I like to see a tiny LED indicator added just like that on the AmazonBasic unit. [Bottom Line] The Anker PowerPort+ 6 is able to deliver up to 60W total power as advertised. Currently it is priced about 25% higher than the AmazonBasics unit, but I definitely recommend getting the Anker unit since is a much better product.