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  1. D

    Connecting EM3EV to A2B. Reuse parts?

    Thanks so much for your advice and response. I did purchase a new BMS when that one smoked and I’ll try again. I reordered the pins for the BMS putting them in order. I watched a video on wiring a BMS which I clearly should have done before! Will post how the new one works out. Thanks again.
  2. D

    Connecting EM3EV to A2B. Reuse parts?

    Uh oh. Also. Do the positive wires in the harness have to be in order? When I plug the harness into the BMS and nothing else the BMS starts to smoke and that seems bad. I’m fairly sure I have the negative wire in the correct spot in the harness but I didn’t give any special consideration to the...
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    Connecting EM3EV to A2B. Reuse parts?

    Ok. I’ve got the BMS but am a little unsure of the wiring. Can someone please let me know if I understand this right? Wiring to the bike: The positive plug that goes to the bike connects to the last battery (positive side). The negative plug that goes to the bike is soldered to the c- on the...
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    Connecting EM3EV to A2B. Reuse parts?

    Just an update. With the BMS removed from the battery pack the bike has all the essentials working including the throttle, mode selector and assist. The battery capacity gauge on the bike doesn’t work and it seems to forget settings when the battery is disconnected. Those things are no big deal...
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    Connecting EM3EV to A2B. Reuse parts?

    Thanks so much, I really appreciate it. I'll try and connect the new battery directly and see what still works. I am waiting for some XT60 connectors to come in the mail so I am hoping to try this on Tuesday. If you find anything please let me know!
  6. D

    Connecting EM3EV to A2B. Reuse parts?

    Thanks! Here are some additional pictures. It looks like the batteries are fully charged. So I think I am going to take the BMS out of the wiring for now and see if the bike will run. If it runs, I guess I'll just get a different BMS. The two communication wires alongside the power wires were...
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    Can I charge this?

    Thank you for your help. Each cell tested at 4.13 to 4.14 volts. Each of the two battery banks tested at 20.6 volts per bank. Does that mean they are full?
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    Can I charge this?

    Thank you very much. The charger I have is a 4 cell XTAR VC4. Should I get something else for this task or should i attach leads to one charging bay in this charger? I’m happy to invest in the “right” tool for this project. XTAR VC4 Charger for Lithium-ion...
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    Can I charge this?

    Hi, this is one side of the battery pack from my 36v A2B ebike. I believe it was overly discharged from sitting. Can I charge this bank of batteries separately from the bike and its BMS? I know I can disassemble it to the individual cells and test and charge them but I’m hoping to avoid that...
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    Connecting EM3EV to A2B. Reuse parts?

    Hi, I’m new to the forum and appreciate your help. I searched through the forum for an answer but didn’t quite find the info i needed. I’m replacing the 36v battery on my A2B Alva+. I’m replacing it with a new aftermarket EM3EV Super Shark battery. The picture is after i disassembled the stock...
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