VivoStar Portable Charger 20000mAh, Power Bank High Capacity External Battery Pack Fastest Charge 4 USB 2.1A Output With LED Flashlight for iPhone, iPad, Samsung, Nexus, HTC and More- Black and Red

It is very good, fast and safe to use.This is good value for money because it can charge a number of devices very reliable over almost a long period. I have used for three days and it still have many power. Besides, it is quick to charge up.Definitely worth the money.

Charge lasts ages I can literally charge my phone about 5 times at least. Problem is it takes so long to charge itself so if you're like me and forget, make a routine to charge overnight and it will be ready.

Very compact and handy, well worth the price and always handy wherever you go.It's thinner and smaller than most portable chargers I owned or have seen.And It's perfect balance between weight and capacity.While traveling I always need to make sure that once I am out there in the world, I have enough battery left in my phone so that I will always stay connected to the internet, and find my way to the next metro station or next bus via Google Map,WHAT A FIND!

This can power a one bar electric heater for two hours. Scary. A bit heavy but I only charge it once a month! This could power a small car. Phew!Sadly power input micro usb broke and fell into the unit after 6 weeks.Now have the hassle of trying to return it.I don't trust another so have bought a different make.Not recommended.

Over the course of a few weeks this seems to have gradually deteriorated and now only holds enough for a couple of charges of my phone before the battery pack itself needs charging again. Unfortunately the window for returning the product has just closed so I can't even return it. Disappointing.

This doesn't seem to be delivering the promised current so takes ages to charge anything - but does last two or three charges so the mAh is not wrong!

Very good product.Quick and safe charging.Not too big and good look.I prefer the black and red colour. 4 charging port enough for share with friends.It also enough for charging around 9 times my phone (over 2100mAh).Really like it.

This product is perfect to carry during travel. it can charge for 8 phones and it charges really quickly. 4 devices can be charged at the same time. The size and weight is also suitable for traveling. In addition, there are various colors to choose which is nice.