Bests & Worsts Reviews from Amazon

*Build Quality/Performance* Let me go ahead and mention that this thing is a beast. Rated at 23000 is just ridiculous. This is meant for true traveling warriors. This thing has ability to charge you’re laptop, tablet, phone and pretty much anything else you could think of. It’s about the size of my Nexus 7 (7 inch tablet). It has a nice two toned appearance. A faux brushed metal look and a glossy finish. It has a good look to it and feels like a premium product; which it should. Holding it in the hand, it definitely feels solid. Nothing bends or creaks that would cause concern. It has a nice little lcd screen telling you the exact percentage of charge left and the output voltage. The voltage is more specifically if you’re charging a laptop that has very specific needs. 9V/12V/16V/19V/20V are all selectable output voltages. It pretty much has all the connectors for ever type of laptop you can think of, 10 in total. It also has 2 usb ports, a 1 amp and a 2.1 amp output. The thing about smaller capacity battery packs is that you end up charging the thing fairly often if you use it a lot. With this….you probably would charge it once a week and that’s with super heavy use throughout the week. I was able to charge my Nexus 7 and Nexus 5 at the same time with no problems. I also charged many different combinations of phones and tablets comprising of Ipad 4 Retina, Nexus 7, Iphone 5, Nexus 5, Samsung Galaxy s2, S3 and Ipad mini. It take 2 whole days to pretty much go from 100% to 0% charging various devices. Nexus 5 – 63% > 100% = 851mah Nexus 7 – 89% > 100% = 435mah Ipad 4 – 52% > 100% = 5548mah Nexus 5 – 89% >100% = 253mah Ipad 4 – 87% >100% = 1502mah Nexus 5 – 58%>100% = 966mah Nexus 7 – 88%>100% = 474mah Ipad 4 -59%>100% = 4739mah Nexus 5 -0%>65% = 1495mah Nexus 7 – 85%> 100% = 592mah Ipad 4 – 86%>100% = 1618mah Total MAH actually charged via devices = 18473 18473/23000 = 80% efficiency of the battery to charge other devices. Basically 80% of 23000mah is actually useable. Which is a really good % compared to other external battery packs. Also, it was able to charge my Lenovo Y510p laptop no problem but I didn’t use it in the testing as I mostly used it when I was out and about. *Conclusion* If you’re looking for something that small and portable to use around the city this probably isn’t for you but if you fly all across the country and don’t want to worry about any of your devices running out of juice or having to find a wall socket then this would be. It is a monster of a battery pack meant to do serious work. For the price of 100 bucks, the ability to charge me laptop and every other device is a no brainer. Especially not having to worry if the battery is charged all the time.