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Showing posts from May, 2023

Salvaged Lithium Ion Batteries for eBike Builds

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  Used Battery description My first eBike battery pack used brand new cells that I purchased for $2.75 each (EVE 25P). They were marked as 2500 mAh batteries and tested at 2200mAh. I thought it was a pretty good deal until I came across bulk modem batteries that are being sold for about 75 cents per cell (Samsung 26F) and the cells I have measured so far are showing capacity ratings between 2200 and 2500mAh.  They appear to be a far better deal than my brand new batteries.  I purchased 40 packs to get 80 cells and so far only 2 were not useable and 3 with capacity below 2000mAh.  I liked the value so much that I bought an additional 20 packs before they sold out. Used Modem batteries delivered I figure the additional cells will allow me to build longer range batteries or higher voltage batteries. The 2 upcoming retrofits that I will be working on will be for my son who needs a higher voltage bike to get him up the steep hills where he lives but not necessarily longer riding distances a