Index power bank 2500 mah I am using since one month but I am not satisfied with this power bank. Battery life is very less as they are saying that battery life is 2500. The design of the battery is really awesome means very light and slim it helps to carry easily and Handel easily. The battery is really very durable as I m using since one month but not getting any physical problems. The thing is only that index need to work on this power capacity or else battery is average and value for money is very good.