# Convert a power bank into a UPS **URL:** \ **Category:** Support\ **Created:** [3 August 2022 01:47 UTC](https://forum.core-electronics.com.au/t/convert-a-power-bank-into-a-ups/14735 "2022-08-03T01:47:33Z")\ **Posts on this page:** 1\ **Showing post:** 7
**Author:** ![Trent5487676](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/trent5487676/32/4583_2.png) [@Trent5487676](https://forum.core-electronics.com.au/u/Trent5487676)\ **Post date:** [3 August 2022 03:11 UTC](https://forum.core-electronics.com.au/t/convert-a-power-bank-into-a-ups/14735/7 "2022-08-03T03:11:41Z")
Hi Craig, I think I know what you’re after, a cheap and effective UPS made by modifying off-the-shelf USB battery banks has been a bit of a search for the holy grail on this forum recently. There was an extensive discussion on all the challenges involved in this thread very recently, which is likely why @AndrewBG @Robert93820 and @Jeff105671 are being so direct in their advice. The short version is that all the things that make battery banks cheap is also what makes them terrible UPS systems and filling that weakness is where all the expense and complexity of a UPS comes from. > [@High Amp DC-DC boost board](https://forum.core-electronics.com.au/t/high-amp-dc-dc-boost-board/14030): > > I have a Pi 4 that I want to power by 18650 battery @ nominal 4.2v, including charging, but it needs to be above 1Amp output. My existing boost boards work perfectly from a single 18650 for the Pi Zero 2 W, but obviously that doesnt require as much herbs as the Pi4. So, I’m looking for a DC-DC boost board that can take \<4v and boost it to 5v, but at \>1A. I know that that is a big ask, and this is why I am having issues finding the magical unicorn. I can run the Pi4 direct from the 18650 fine… --- _[View the full topic](https://forum.core-electronics.com.au/t/convert-a-power-bank-into-a-ups/14735)._