Ambrane 10400 mAh Power Bank P-1000
http://www.groupon.co.in/deals/shopping/ambrane-power-banks/796585
Rs.519

Use Coupon RAINS For Extra 20% Discount

After Applied Couon Price Rs.719

Also Pay by Payumoney & Get 30% Cashback (Max Rs.200)

Price Comparison :-

Amazon @ Rs.1699
http://www.amazon.in/Ambrane-P1000-Power-Bank-Black/dp/B00I7KBG8K

Shopclues @ Rs.859
http://www.shopclues.com/ambrane-power-bank-p1000-star-10400-mah-with-samsung-cells-black.html

Snapdeal @ Rs.829
http://www.snapdeal.com/product/ambrane-p1000-star-10400-mah/1605165924

Paytm Rs.807
Use Coupon Code - MACC15

https://paytm.com/shop/p/ambrane-p-1000-star-10400-mah-power-bank-with-samsung-cells-white-AMBRANE_P-1000STAR_10400MAH_WHITE_27123