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  1. D

    What kind of charger?

    I'm having to replace my charger - what do you recommend? I need to be able to set to a specific custom voltage for my home built 18650 pack. Links or specific model numbers to search for would be greatly appreciated.
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    Charger Suddenly over charging !!!

    Since last fall I've been using a charger I built using a Drok boost voltage regulator ( https://www.amazon.com/DROK-Numerical-Regulator-Converter-Adjustable/dp/B01GFVI6R6/ref=cm_cd_al_qh_dp_t ) to charge my home built 18650 battery packs for 2 bikes that my wife and I ride weekly - and no...
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    Is Voltage sag damaging to batteries?

    I recently added voltage meters to the bikes that I put together for my wife and I... After a few rides with them, it's clear that whenever you "get on it" the voltage sags around 3-4 volts - probably more at times. So if you consider 3.3 volts per cell to be the danger zone (42.9 for my 13s...
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    No BMS - Do you use a fuse?

    If you aren't using a BMS do you use a fuse or circuit breaker? If so how do you size it?
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    2 Controllers Toasted in 2 Minutes?

    I just finished assembling 2 ebay* kits http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemVersion&item=222117405994&view=all&tid=1775136905012 The homebuilt battery packs*** are 48v 20 amp and Should be about right for a 48V 1000W kit - I would think. Anyway, both bikes fired up - all systems go...
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    I THINK I know how to hook up this BMS??!

    First time doing this - Building a 13s 48v battery pack out of 52 18650s. Of course the BMS comes with no guidance whatsoever other than that it can be used as either a 14s or 13s manager without adding any components. My best guess is that I just connect my cell+s B1+ through B13+ to...
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