I've been working on a simple power bank project that's been built using Li-ion batteries, the batteries are rated 3.3 V.
I've implemented a charge controller which can efficiently charge the power bank batteries from USB charger without any issues.
The problem here is that I want to create dual output 5 Volts slots 1 and 2 amperes respectively for charging external devices. How can I do that efficiently ? I've surfed the internet and found articles and answers about current limiting using resistors and/or transistors but i'm so confused now.
Thanks so much.