Make A Battery Bank (for almost $0)

[VK3ZYZ]

This is the haul for today. Almost a full 2KG Yogurt container full of batteries.
The soggy bits and silicone rubber parts went to the bin.

 

[VK3ZYZ]

I'm having a hunt to see what parts other than the battery could be of use.
Here is some info on the controller..

Vape ASIC

An IC for your smoking pleasure: Shave pennies off of your e-waste BOM.

robruark.com

 

[VK3YNV]

Interesting design, He didn't explain why they didn't opt for the cheaper N-channel fet?

There are some good videos on making power banks, just search Youtube for "diy power bank" might be some good ideas there.

 

[VK3ZYZ]

So far I've tested 86 of the blue 18450 cells, (and a few others) and the results are pretty good.
I do think the ambient temperature takes a place in the capacity as the colder overnight tests read a bit lower.
There are enough cells to build a pretty good battery!