I just got a new electric bike and I'm thinking about adding an extra 36V 20Ah battery to get more range.
What I'm thinking is to pull out the main battery when it runs out and connect the second battery to the port which the main battery connects to.
This is the port on the body of the bike:
And this is the port on the main battery
But for that I need a male connector same as the main battery. I don't know what it's called; does anyone know? I did Google it but I guess I don't even know what to look for...