Multiple stable 2.5amp sources for a Pi and other devices is important and not always reliable with many 12v->5v converters or even with (how I would probably d

Multiple stable 2.5amp sources for a Pi and other devices is important and not always reliable with many 12v->5v converters or even with (how I would probably do it) with a power bank that acts as a buffer and is charged via 12v. It's messy but it works, if that bothers you then you should read about how inefficient compilers can be.