using 1 battery or 2 batteries for project

I am planning to use 2 li ion battery pack for my project since some components require 12V and some 5V. Is there a possibility that I can charge them with 1 charger (for aesthetic purposes); or should I use one 12V to power everything and covert the voltage to match the 5V application. what is the best thing to do? thank you.

submitted by /u/EnginerdLearnsReddit
[link] [comments]