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Max Iso
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Re: who moved this thread ?
Nathaniel Stephan wrote:
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.
Funny you mention those bc i had seen the packs last week to house them. 3.7v right? The housing fitted two which worked out to a perfect 7.4v. The only problem was they were only up to 5kmAh if i remember, about the same capacity as 3 OEM camera batteries for my G9.
So banks are not accurate? Can they legally do that? Isn't it possible they just have 2 in series and then two sets of that in parallel for double capacity? Or 3 sets for triple? I have a pair of 16750mAh RavPower banks and they charge a phone at least 3 times and have charge left, that puts them well over 10k right?
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