I had that on mine to. After washing or rain. It seems to be that the on off Switch is not waterproof. After filling ist with WD40 it disapeared. Maybe check also the contact on the Motor wire. Sometimes there is some water in the connector.
It seem to be that your solution is very reliabel. Have to get my arm fixed so i can go on. Its so frustrating, sitting at home, do nothing, and the Summer goes by... everyone enjoying their bikes... ?
Yeah the cells may improve capacity after charging it a few times. Nice to hear. Looks like your system work fine. I had broke my ellbow last week so my projekt have to wait... ?
Hi, i found these bottle. You can configure it after your demands and it dont look ugly. Maybe i go with these. Neue Ankunft Mini Flasche eBike Batterie 36V 10,5 Ah 9Ah 7Ah für Bafang Motor | eBay
If i am understanding right, you dont even need a Rosenberger connector. You can solder on two wires under the Rosenberger plug in the Focus harness and bring them out where you want. Then just plug your extended battery on.
If i right the System recognizes the range extender an drains it first...
Hi, i found this on the German pedelecforum.
maybe it can help you. In the first picture it shows a sam2 with a hilong battery 500wh mounted. But this guy wired it with a ideal diode direct to the motor. Second picture shows the internal wire of the jam2.