Or....
Just get a bunch of these off of ebay. I work with kids doing robotics. I got 5 of these and I filled them with 2500 mah cells. So I guess that I am at 50k mah...
They are easy to charge from any USB port. And in a crunch I can just swap out flat cells for freshly recharged cells...
Really? When I click on the link it works for me. It is a short clip from 5:07 to 5:22
Here are some screen grabs to show what I am talking about.
John-
I don't know if this has been discussed yet, but I just ran across this 18650 cell testing setup in a YouTube video. Does anybody know about this?
Thanks,
-John-
Korishan,
It is my judgement, from all of the data that I have, that lithium batteries are a greater fire risk than lead acid batteries, by a large margin. We can debate how wide that margin is. The fact of the matter is that lead acid batteries have been around for a long time, been smashed...
Mike, Korishan,
Agreed. But to my knowledge there is nothing you can do to a lead-acid battery to cause it to burn (yeah, they generate hydrogen, but venting removes that risk). 18650s are filled with flammable substances and have the ability to self-ignite, thus must be treated accordingly...
I understand. But your picture shows an array of 14 x 5 tubes. So if each tup has 100 cells then your total is 14s100p x 5. Am I not understanding something correctly? Or is each tube just 4x5?
Thanks,
-John-
NERDville,
There is a thread, "Tp4056 reverse voltage protection", that addresses this to some extent. In that thread it was advised that schottky diodes were the way to go.
-John-
I would love to know more about your process! Given the number of cells you have processed, you must have a few tricks you have figured out.
Thanks,
-John-
Scepterr,
As an engineer that has worked in the manufacturing sector for decades, all I can say is that I wish that were true. Spec sheets frequently just parrot the relevant standards and have no direct bearing on the manufacturing process. And even if they left the factory in spec, by the...
Scepterr,
Yes. But "as-designed" and "as-manufactured" are frequently different in the real world. I am curious about the "as-manufactured" dimensions.
We may find out that all of the cells are manufactured to a tight tolerance, and the data is boring. But we don't KNOW that until we actually...
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