http://www.amazon.in/dp/B00POJUXPO/

Shape: Compact design, super portable, easy to hold in your hand and put anywhere your want, e.g. a pocket or bag.
Constructed using Powerocks original Grade A cells and premium microchips to ensure safety worry-free use.
Long lifespan with over 500 recharging times, LEDs display how much juice you've got left.
Provides overload, overcharge, short-circuit protection and also protects from self-discharge
Portable Charger: Suitable for a wide range of occasions, such as parties, BBQs, and outdoor activities like camping, mountain climbing, and picnics