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    SOLD Bafang BBS02 750W Mid drive kit (never used, just opened) USA

    SOLD Hello, I'm selling a new never used Bafang BBS02 kit. I had plans to install this kit on a bike, but those plans changed and I went a different route. The kits brand new never used, I just opened it. BBS02 Motor C963 Display 48T Sprocket 68mm bottom bracket Selling it for $400 +...
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    A simple but practical and cheap EV range extender?

    So all production EV's I'm aware of use a 12V flooded lead acid battery which is charged by a DC to DC converter off the main Li-ion pack. This 12v battery powers lights, fans, accessories, and other car electronics. Some articles I read suggested that it may even be powering the heating and...
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    Custom Laser cut battery tabs?

    Does anyone know of a source or supplier that will laser cut smaller volumes of pure nickel tabs in a specific shape with slots for welding? I need a few hundred to a thousand tabs cut. One of the batteries I rebuilt requires custom tabs to do the job properly and it takes me a while to cut...
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    Charging a 48v eBike battery with 13 1s chargers?

    I think this topic has been discussed before, but its a very difficult topic to search for on the forums. I'm thinking about my next eBike battery build, maybe using no BMS, but instead charging the 13s pack with 13 individual Li-ion charging PCB's which normally run off 5v. So basically I'd...
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    GT Aggressor Pro Mountain Bike + BBS02 Bafang?

    Dick's sporting goods right now has the GT Agressor Pro mountain bike for 50% off -- $299. Looks like a decent bike for the money. For the bottom bracket all it says is that it is "cartridge sealed." Anyone know if this will work with the Bafang BBS02? Or anyone have experience with other...
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    Highest Quality high current 26650?

    Hello, So a customer wants me to rebuild their Milwaukee V18 batteries, which use 5x26700 Moli 26700A's. These are 2900mAh, 40A rated 3.8v IMR cells and it doesn't look like they have been produced in years. Looking around it also looks like Sony and Panasonic have discontinued their...
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    Hybrid battery conditioning?

    So I randomly stumbled upon an article talking about hybrid battery conditioning services. All it really says in the article I read is "Conditioning means that the pack is cycled (top charge taken down to zero then back to 100%). This is good for the battery pack and the cells but can also help...
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    Bike specific tools for installing bafang mid drive?

    Hello, What bike specific tools do I need to install a bafang mid drive kit? I believe there were a couple bike specific wrenches I saw in a video tutorial but they didn't say what they are called. Also are there any good "work arounds" if say I didn't want to buy these bike specific tools...
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    Cycling IMR 26650 reduces its internal resistance?

    Hello everyone, I just wanted to share a little test I've done. I had some old stock MNKE IMR 26650 that was never used laying around. Almost all of the cells had a terrible idle increase in internal resistance when stored inside in a climate controlled environment at the cells ship voltage...
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    Hobby charger for cycle testing?

    Anyone have any good recommendations?
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    Reducing Welding electrode sticking?

    Hello, I've owned a battery spot welder for about 3 years or so now. At first it was just a cheap China 110V transformer based welder from aliexpress. First one was DOA, and second one worked great for 1 year then went out. I couldn't ever put it past about 50% power though without it...
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