Reviving FREE Batteries: Test, Make Safe & DIY Capacity Tester! @atomic14
Reviving FREE Batteries: Test, Make Safe & DIY Capacity Tester!  @atomic14
Uploaded July 2022 | Updated September 2026, 1 week ago
As always we're sponsored by PCBWay.com/?from=atomic. This time we're looking at some free batteries I picked up off the street. @bigclivedotcom seems to have collected a lot of these, I've only found two so far. I'm feeling quite deprived.

I'm using this very cheap battery capacity tester (the HW-586) in this video: https://s.click.aliexpress.com/e/_DBlbQV5 or amzn.to/3PvH0qh

Though in the end, I upgraded to this much more accurate one (the DL-24): https://s.click.aliexpress.com/e/_DlwD4LD or amzn.to/3Oa1S5r

For the DIY version, I used a TTGO T-Display: https://s.click.aliexpress.com/e/_DC535ij or amzn.to/3RvjT0Z

There's a great video teardown of the HW-586 battery tester here: youtube.com/watch?v=7SWExcGAnOQ

0:00 Extracting the first batteries
0:45 Run Away!!!
1:00 Does it charge up?
1:10 The TP4056 charging board
1:54 Measuring the first batteries capacity
2:23 Second battery
2:54 What's the capacity?
3:05 Let's make our own battery capacity tester
7:16 Making the batteries safe(r)
8:30 Bonus content!

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And if you're shopping on AliExpress or Amazon then if you click on these links I will get a little bit of affiliate money:

Aliexpress - https://s.click.aliexpress.com/e/_Ac05mF
Amazon - amazon.com/?tag=atomic14-20

You can also join us on Discord here: discord.gg/h2DDnDdjD2
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Reviving FREE Batteries: Test, Make Safe & DIY Capacity Tester!

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