Don't mind BenJ, He's always kind of a dick, talking down to folks. You can create a junction, either with solder or crimped connectors, for the Yellow/Green/White BMS wires. So that both battery's BMS are connected to the controller. I've had success with this method, and you still have 2 fully functioning BMS controlled batteries. Make sure they're both fully charged before connecting them. Also, since the secondary battery is mounted externally, I'll advise disconnecting the parallel power connection before recharging them separately. This stuff isn't as complex as some folks would like to pretend. Good luck!
Ben J wrote: ↑
Tue Aug 20, 2019 5:29 pm
To make it ”work” You need to eliminate BMS of the aux battery or rebuild the entire BMS system to incorporate all cells.
Eliminating any BMS is hazardous. But it will work, until it doesn’t... When that happens, results are smokey.
Obviously, you are in over your head.
Ofirk wrote: ↑
Tue Aug 20, 2019 4:01 pm
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I'm trying to upgrade my scooter range by adding a battery.
I've two m365 batteries.
I tried to connect the two batteries in parallel. but only one battery data cable is connect to the main board.
I used this cable:
But, when I turned the sccooter on the additional battery led turns to red instead of fast flashing.
Any Idea what I'm doing wrong?