I have been using this device since 10 months and m really impressed with it. Its service is being decent through these months. Once fully charged can powerup my 2100Mah device thrice atleast..so i would recommend to go for it.

Ok! First of all i should say u can't get a better product at this price nice and timely delivery, well packed by flipkart, no complains at all.
Now about the product its very good and believe it or not i have charged my 2000 mah phone 4.5 times(my battery backup had reduced that's why i think it had been charged 4.5 times I think it is providing 8000mah+ but i am not sure..
But it surely has some cons:
1. It is bulky hence problematic for carrying around.
2. It is made of cheap plastic and ...

very nice products after full charge I have used for spice android one mobile can charge 3 times and 2 times tablet 7"
very nice look, easy to carry, only charger problem, but, nice price

its charge my micromax a110(2000mah) 4time...12h+ time to full charge..its also charge my letv le 1s in 1h(20%to100%) its support fast charging..2.1A output

very nice ..3 times charged fully and compatible with Sony Experia and other samsung set.. good product

very good battery backup nice look

I Have Also Use This Product @ 3 years ago. I would thanks to flipkart for this product ....Thank you So Much....Flipkart....

I used this product @ 1year ago Its really good product at this price. this is battery capacity up to 7500 to 8000 mah so this capacity told by Ambrane 10000mah but i know its engg. funda @ battery. my letv le1s 3000mah mobile battery charges up to 2.5 times up to date. keep it up Ambrane... Battery ka bapp Hai ye😘

REVIEW After One year of Usage:

Well First of all the​ Power Bank was awesome when it arrived and had a decent battery backup.
Could charge my Lenovo K4 NOTE which has battery of 3300mAh for almost 2.5 times.

Its charging is super fast as it has 2.1A output
And it takes 10-11 hours to get fully charged.

Now After 1 year it is almost like a brick, Can't even charge the same phone for once.

For the price it is good but don't expect long life.
Go for it if u can get it in sale, otherwise...

Best powebank at this price , though it takes long to get fully charged but once its charged it charges my Mi4 with 3000 MAh battery 4 times from 15-20% to 100 %. It has an led torch also and two usb ports to charge two devices at once. The build quality is great and is total value for money . Took it to Leh - Ladakh for a 14 day trip.