The power bank takes an insane amount of time to charge fully (nearly 36 hours!) but drains battery pretty quickly in comparison! Second issue which I am facing is that I need to do a lot of manoeuvres to make sure my phone is charged, just plugging it in and hitting the power button on the power bank doesnt seem to work all the time. You have to make sure that you switch on the power bank and plug the phone in when the light is blinking...too much work and stress! At the price, its just not worth it! Wont recommend at all.I seem to have lost the packaging, else I would have sent it back.