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So, im trying to figure out how to wire in an external battery for my computer electric scooter for more range. I messaged the manufacturer but only got a concluding message of the factory workers having faith in me. No specific information provided to me as I requested. All I see are 2 sets of wires coming out of the battery, 1 for each controller (my scooter has 2 wheel drive). I can’t be for sure without taking off the green wrapping. I’m pretty sure it’s what I have in my diagram. Currently the only way for me to put another battery in parallel without affecting the original battery is shown in my sketch. Would this work?enter image description here

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    \$\begingroup\$ Welcome to EE.SE! If you need to ask, don’t! It would be technically possible but a hassle when it comes to BMS and charging. Get another battery and swap when you run out of range on the first one. \$\endgroup\$ – winny May 16 at 7:49
  • \$\begingroup\$ no, this doesn't look like it would work. \$\endgroup\$ – Marcus Müller May 16 at 8:38
  • \$\begingroup\$ check to see if it runs also when charging, then use that charge port with a DC-DC converter to boost charge . I have faith in you not to blow it. But then we learn faster by failures. \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 May 16 at 11:38

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