Wall Wart and Battery = Small Ups: Good Idea or Not?
Posted2 months agoActive2 months ago
edn.comTechstory
calmpositive
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UpsDiyPower Backup
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Ups
Diy
Power Backup
The post discusses using a wall wart and battery as a small UPS, with commenters sharing their experiences and thoughts on the idea, highlighting its potential usefulness during power outages.
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- 01Story posted
Oct 20, 2025 at 8:37 PM EDT
2 months ago
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Oct 20, 2025 at 8:46 PM EDT
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Oct 20, 2025 at 9:48 PM EDT
2 months ago
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They set up fiber-to-the-node down the road from me and that gets power from the ordinary power lines so when my power is out my ADSL is out and I'm not getting any work done anyway.
I certainly thought it was ridiculous that I was doing AC-to-DC-to-AC conversion with the UPS when just charging up a DC battery would be so much more efficient at the scale I was working. I thought it through though and came to the conclusion that the market didn't really exist.