100Views1Replies

Author Options:

Power Banks vs. ac wall outlets Answered

I've observed in many power banks, that they charge up my phone a LOT quicker than a conventional ac adapter plugged into a wall socket. Why is this so? Many of my friends share the same observation. I'm building a simple power bank myself, and I want to make sure I can enjoy this feature when I use it too. I plan to use this instructable as a guideline with some modifications:
https://www.instructables.com/id/Rechargeable-homemade-Power-Bank-super-Easy/

I'll be using four 3.7V batteries in parallel and stepping it up with a step up converter, so that the mAh value gets added up (forgive me if I'm wrong, but I believe mAh adds up when batteries are in parallel). Will this arrangement give me faster charging times like the power banks available in the market? Is it a safe circuit? Please suggest as I am eager to build this :) Thanks in advance :)

Discussions

0
None
Downunder35m

3 years ago

It does not matter how beefy your power supply is if it does not match the charging standard for your device.
Check Wiki for the USB charging standards ;)
Most normal devices are happy with around 1.6V on the data lines, but Apple uses a slightly more complicated system with two different voltages on the data lines.