Battery power for Plate Amp 2.1

Hello all. I would like to use the Plate Amp 2.1 in a portable speaker. I have built many Bluetooth speakers with other brand amps. I really like the look of the plate amp opposed to the upstream 2.1. Has anyone done this yet? I have located the DC in tab. I also have a 24v 18650 battery board from Dayton Audio. From what I am gathering from the board positive is on the right and negative on the left. Can anyone confirm? Also of this is even a good idea ….lol. Thanks.