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  1. P

    kWeld, battery back spot welder - already built, but never used - prefer US onlyE

    Selling my kWeld, received it a couple of months ago, and put it together, but never had a chance to use it, and am in the middle of moving, and don't expect to make use out of it anytime soon... I figure might as well get it to someone that will. I've kept it in an anti static bag, inside the...
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    Strange issue with e-scooter controller, and battery voltage

    So, I;m trying to help a friend fix his 60V scooter. The battery had been drained and left that way for some time,... I took the battery from him, and brought the charge back up to about 60V and returned the battery. The scooter had been running fine before the battery died (months ago). He...
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    2 wire high voltage battery voltmeters and more

    Hey guys, so I've been on the lookout for a simple voltmeter to install on my home built battery packs (at least supporting 20s ideally 24s). I didn't want one that required a separate low voltage power source, which was all I was finding (ones requiring <30v power supply). Well, I finally...
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    What MOSFET to upgrade with?

    If you were going to upgrade your controller's MOSFETs, which ones would you go with now? I know the old favorite is the IRFB4110, but with how quickly technology is evolving, I assume there has to be better choices at this point. After a little research, I've seen people recommended the...
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    Running a BMS at lower # series (ie. 24s BMS with 20s pack)

    Quick question, as the title says... Is there any harm in running a BMS at a lower number of series... say if you had a 24s BMS, but used it on a 20s pack? I'm about to order some BMS boards, and the model I was going to order for some 20s packs has the option to go up to 24s. If I order the...
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    Plausible to build custom variable voltage Lion charger?

    I've been wondering why there are practically no variable voltage chargers for ebikes, all I can find is the Cycle Satiator (Which I admit, seems like a really nice charger, a little pricey, but with no competition, well worth it I suppose). But why are these not common by now? It seems like...
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    Chain tugs that'll work with Chris King fun bolts?

    So I'm about to install a Cyclone 3000w kit onto a Single Speed mountain bike that has track dropouts and Chris King hub with Fun Bolts. I'm thinking a pair of chain tugs would be a very good idea... but not sure what ones would work with these Fun Bolts. Anyone have any recommendations?
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    Anyone have White Industries freewheel removal tool?

    Hey all, hoping this is the right place to hope, as well as hope this doesn't offend anyone. I'm about to convert a bike to an ebike, and the current bike has "The Eno" crankset/freewheel from White Industries. I can't say I want to spend $40+ for the removal tool for a single use.... unless I...
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