Bests & Worsts Reviews from Amazon

This is the highest capacity power bank I've ever purchased. It does everything you'd expect and it lasts far longer than I anticipated before requiring a recharge. I've charged it from solar panels, various wall chargers and they all charge it, albeit at different speeds based on power output from the charging source. On a sunny day with a solar panel outputting 5v/2A, you can charge this full and have enough time to about half-charge a second. The kinds of devices I've charged or powered successfully: * iPhone 6s Plus * Lumia 950XL * Microsoft Band * 5v to 9v/12v converters - to which I powered a 9v fan * Sony MP-CL1 projector * Microsoft Display Dock (for Lumia 950/950XL) * Lumsing USB-C to HDMI & USB-A adapter In terms of simultaneous power draw, I'm not sure it lives up to its total max output of 5.8A / 2.4A per port. It gets close, but not 5.8A close. I had a Lumia 950XL via Lumsing USB-C adapter (2.4A) + Sony MP-CL1 (1A) and it worked, but adding a third device was too much, even if it was a 1A device. That would have totaled 4.4A, leaving 1.4A headroom. I would have expected the circuitry on the RAVPower to throttle the output to one or more of the ports so they would all operate simultaneously up to 5.8A out. Unfortunately that's not the case here. The power bank simply turns off power output entirely. I've used a Samsung 5.3v/2A charger and measured it with a DROK usb meter - the battery will take all the juice you throw at it, so it's pulling around 11 watts during peak charge draw time. I've yet to test it with a more powerful source. The packaging was great, it felt like an experience to open it. I love the supplied bag, and the two flat USB-A to USB-Micro cables (one is about 1 foot and the other is about 6 inches) were an added bonus. Don't forget to register he power bank with RAVPower so you get a lifetime warranty. Knowing the battery will eventually require replacement, this is an added bonus. None of the other power banks I've purchased in the past offer this kind of warranty.