If you want to make your own square dance stereo, it is recommended that you use lithium batteries. However, the voltage of the audio battery should match the power of the amplifier and speaker inside the audio. Otherwise it is easy to burn out the sound.
Choose lithium batteries is mainly it is small, and lightweight, and is simple to take care of no trouble. But it is also relatively expensive.
The main reason for choosing lithium batteries is that they are small and lightweight.