I am using an old phone its battery drain at very high speed. so to solve this problem I purchase Ambrane Power Bank . Delivery of the product was faster than I expected. I thought it will give me a great performance but other than its name the power bank does not charge phone at great pace you can’t charge to mobile with this Power Bank it take long time to recharge it. You will have to wait 6 to 7 hour to charge it. It’s get heated up when you charge your phone for long hours the plastic covering of this phone is for a bad plastic. Over all this is not a great power bank.