How do the Biktrix DUO bikes work with two batteries? Read on to find out!
The Duo bikes are equipped with a dualizer. This dualizer switches from battery 1 to battery 2 constantly, depending on the battery's charge. So actually, the bike is only drawing from only one battery at a time, but the dualizer switches from battery 1 to battery 2 and back.
As only one battery is really connected to the bike and display at a time, the display will only show the charge of the battery the dualizer is currently drawing from. Therefore, the changes between the batteries will probably not be noticed by the rider.
The dualizer switches between the batteries based on the charge. If the charge of battery 1 is lower than battery 2, the dualizer switches to battery 2. The bike is now drawing from battery 2. If the charge of battery 2 is lower than battery 1, the dualizer switches again. And so on...
So you might wonder how does the Dualizer work with two batteries of different voltages ie a 48V Hidden battery and a 52V Range extender. It essentially acts as a switch which allows for a full circuit between one of the batteries and the motor while isolating the other battery from the circuit. Thus you aren't running these two batteries of different voltages simultaneously through the bike but instead it is a switching system to ensure each battery is isolated from each other but still able to power the bike.