Is using a power bank bad for my phone?

No not at all, in fact power banks are really helpful in charging your phones, as in today’s scenario smartphones are the lifelines of people without a smartphone a person cannot live even for a day in such a scenario phones needs to be fully charged so that they can run for the entire day and it’s not possible to carry your charger everywhere as you will not be able to find plug points.

At that time power banks are helpful specially when you are travelling because you can charge your phone on the go anytime anywhere until and unless your power bank charge is drain, so using a power bank is not at all bad for your phone but it’s very necessary to use the right power bank suitable for the right phone, as all power banks are not compatible for each phone.