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Hi All, I have a hell lot of powerbanks that we rented out on music festivals (period 2014-2016) They where all manufactured to our specsandcame with Samsung 2600mAh cells ( ICR18650-26Han 26F). They have only been charged 15-25times. So I've been setting up a testlab, thanks tothe info on...

Hi All, Started to harvest my cells from the mega amount of powerbanks that I have. While taking them apart came up with the idea of using the parts to build some 12 piecechargingmodules. Recycle and Upcycle. So I did. Workes like a charm. Charges them all to4.2V...

Hi, My name is Jur, 43 from Rotterdam the Netherlands. I started a phone-charging-service at music festivalsin 2009. The handling of the phones became to much,(singlechargingthem in cabinets)so I came up with the idea of renting out powerbanks in 2012. And the next year implemented it. Extra...