Fast charging from powerbank - bad for phone battery life ?

Hi, is using of the fast charging from powerbank bad for a mobile phone battery life ?

Actually both regular and fast charging have impact on battery life, because they degrade battery capacity. It is difficult to say, if the fast charging degrades battery capacity more than regular charging. Some say it does, other say it doesn't. Fast charging often produces more heat, which is considered as not good for a battery.

I would say, the impact of fast charging on phone battery also depends on technology, so it could be different in case of specific brands or devices.