Uploaded March 2023 | Updated September 2026, 2 weeks ago

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Previous video: youtu.be/sF0KOVWj9p8
555 Timer video: youtu.be/fLaexx-NMj8

The video that was sent to me: youtube.com/watch?v=i_yFhI1JRDM

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Websites which were shown/used during the video:
cdn.hackaday.io/files/257411101302944/batt%20desulfator.pdf
thesai.org/Downloads/Volume8No7/Paper_72-Impact_of_Pulse_Voltage_as_Desulfator.pdf

In this video we will be having a closer look at Desulfator circuits. A while ago a viewer sent me a link to a YouTube video in which someone made his own DIY design that he then used to "revive" and old lead acid battery. By doing that the original capacity of the battery got restored. That sounds too good to be true. So I made my own design, did tests for more than 30 days and ultimately decided whether all of this is fake or real. Let's get started!

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Thanks to Altium for sponsoring this video.

0:00 The Suspicious YouTube video
1:22 Intro
1:43 Desulfator Basics
2:59 My Car Battery is Done for
3:56 Testing my 2 Lead Acid Batteries
4:44 How does the Circuit from the Video function?
6:19 Testing the Circuit from the Video
7:03 My own (better) Desulfator Circuit
9:35 30 Day Test with my DIY Design
10:11 14 Day Test with Commercial Desulfators
10:44 Verdict