Pasley69
New member
I have a gravel bike that I converted to an ebike - it works great (36V and 250 watt) and I use it also for longer loaded-touring rides. However I have started to hit the limits of range (about 80km). So I started carrying a second battery on my rear rack and use an extension cable (I use Anderson Power-pole connectors) to connect it to the motor. I.e. unplug the main-battery-to-motor connection and plug in the extension-battery-to-motor connection. It worked OK. Then my brother used the system for a long trip and when the first battery faded he did the cable switch for the extension-battery. However he made a mistake and connected the two batteries together - almighty click and that was that. He realised his error, but plugging the extension into the motor now didn't work either and I had to pick him up in the car. Fortunately the original battery (once charged) and system still works. I am guessing the 2nd battery is now cactus - fully charged battery connected in parallel with another basically flat battery with no amperage limitation.
My reason for writing this is to warn others that using Anderson Connectors like this is no guarantee of a safe outcome - and to ask if anyone has ever tried this and come up with a simple way to avoid plugging battery into battery?
My reason for writing this is to warn others that using Anderson Connectors like this is no guarantee of a safe outcome - and to ask if anyone has ever tried this and come up with a simple way to avoid plugging battery into battery?