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First draft of external ML battery power -

Started Oct 7, 2019 | Discussions thread
Nathaniel Stephan New Member • Posts: 2
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Max Iso wrote:

i think it's simpler to just use the dummy battery and get a power bank with DC out, and not worry about my USB port getting ripped out.

Don't buy a sealed battery bank. They all have cheap 18650 cells in them. When they're tested, the capacity will not be close to what the battery bank is advertised as.

As soon as one of the cells goes bad, the entire battery bank will no longer work.

Instead, get a battery bank that allows you to use your own 18650 cells. Used cells are easy to harvest from laptop batteries or power tool battery packs. The price will come out to about $1/cell.

Harvesting used cells is popular with people that make their own power walls and e-bikes.

Then get a battery analyzer, like the LiitoKala Lii-500. With a battery analyzer, you'll be able to find out the exact capacity of every cell you have. This will also help you find the bad cells if you harvest used cells.

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