Sabertooth 2x25 connected to 20v Dewalt Batteries

Help & Support Robot Parts
1

I have 2x Sabertooth 2X25 connected to 4x 12V motors

The 2x Sabertooth currently share a 3S LiPo battery in parallel. I guess the 3S batteries output 11.1V and not exactly 12V, and furthermore, the voltage drops as the battery discharges. 3S wasn’t a wise choice clearly.

Now, I plan to use 20v Dewalt batteries to power the same 2x Sabertooth and 4x 12V motor combination. I need some guidance to implement this.

  1. Can I directly connect the 20v Dewalt Battery output to 2X Sabertooth? Or do I need to use a DCDC step-down converter to drop the voltage to a stable 12v before connecting to the 2 Sabertooth in parallel?

  2. I’m using Packatized Serial (with Teensy 4.1). Changing from 3S LiPo to Dewalt Li-ION, is there anything I need to change the dip switch config?

Any advice is much appreciated.

2

Are you using this sabertooth motor driver? Sabertooth Dual 25A 6V-24V Regenerative Motor Driver - RobotShop
Looks like it can run on 6V-24V. So, 20V can be supplied to it without stepping down.