Based on the existing reviews, WiiM Mini and Pro are using cheaper implementations for the analog output while Pro + is using a much better approach, comparable with Topping E30 and D10s.
Using linear regulators means wasting some battery capacity to produce heat.
Unless the producer of a portable power bank brags about clean output voltage / suitable for audio equipments / something similar, it should be using dc-dc converters.
Of course, if someone finds a model with linear...
If we're talking about portable power banks, like the Samsung one posted above, in most cases they're using multiple Li-ion cells (the voltage of each cell varies from 4.2V to 2.8V as it discharges).
Also, the few ones I've disassembled have one thing in common: no room for large capacitors or...
All battery banks are using dc-dc converters for efficiency.
Given their target (charging phones and other devices), it makes sense to use the cheapest approach and not caring at all about providing a clean output.
If you can find objective tests results for some battery banks, please share them.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.