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  1. P

    Where to find information about the 18v output on the Bosch GAL 3680CV charger?

    Hi. I would like to look at the charge profile for the 18V option on this charger. If at all possible I would like to charge my made-up 18v Liion batteries (using 4x2x18650 cells) which don't have a BMS - instead I intend to monitor the individual 2-paired-cell voltages, both for charging and...
  2. P

    Variable contact pressure on a friction drive?

    Since there are (or have been) friction drives marketed with automatically variable contact pressure (ie between drive roller and tyre) to mitigate slip eg in the wet, I am wondering if I can fit a simpler user controlled variable pressure 'trimmer' (the basic pressure against the tyre is spring...
  3. P

    Repurposing my 36V Li-Ion ebike battery

    Hi, I have a 3 year old 10Ah 36V ebike battery (from Swytch Mk1 ebike kit) which has developed a short on one of the banks(4 cells) of paralleled 18650 cells. Other banks look ok. Rather than replace those cells, which would be difficult in the middle of the pack and may not anyway be...
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