I bought the product so that i wouldn't run out of charge whilke i was out and about. As many others, its frustrating when your phone dies on you.
The product has 3 regular USB ports for normal speed charging (ie same as your home socket), 2.1A, 2.1A and a 2.4A. There is also a micro USB port for charging the device itself. The light itself is a nice addition, accessed by pressing the button on the side.
This product is simply phenominal. It's so useful. I take it out with me everywhere i go, so my phone is never without charge. I also use it around the house, when I am too lazy to connect my phone to a socket charger. It's so much more convenient!
I then just charge this device overnight and my phone overnight, and in the morning, iv'e got everytihng back to full!
The battery pack has never ever run out of battery. Even when i left my phone on one night (note 2 - heavy on the energy!), and left it plugged into the charger. It had 1 light still on, and my phone was still at 100%. So a good 12 solid hours, with the screen on full continuously and apps running.
This product will most likely last any casual user a week or more without recharging, but as its so easy to charge every night, you'll never be without energy! It would be perect for anyone travelling for a week without access to a charging point. If energy usageis key on your travels, to maximise your time, id always recommend to reduce your screen brightness, as that always kills the phone/tab battery and shutdown all pointless apps. Make sure your mobile data and wifi are off, unless you are using them too.
Delivery was propmt, and well packaged. Item is fantastic. The button for the light that a few people have mentioned.....ive had it in my bag, in my pocket, its never ever switched on by accident. So i wouldnt worry about it. However, i do think its a shame that they dont supply a carry case..would have been nice :)