I took apart a treadmill to turn it into an under desk treadmill. Everything went very well with that, but I have some left over parts. I'd like to be able to plug in the speakers with the audio in. I've got it all set up but need to supply power to the small board either by plugging it into the wall or using a rechargeable battery.

The one adapter looks like what you'd plug into a PSU on a computer. From what I've read online I think it might be an ATX connector. The other seems to be a JST connector or something similar. I'd rather learn this stuff more myself so if you have a good guide on how to identify these and other connectors please let me know.

I have two options to connect power to the audio in and speaker board. I've attached pictures of both options.

 

If this is low voltage and polarity is an issue it may be expedient to change to something commonly available. There is the polarized RC type connectors XT90 or Dean Charger connectors.
Very readily available.
Max.

 

Thanks Max. Honestly, this is the first project I've ever attempted and I don't know much about how it works, other than trial and error (unplug this, buttons stop working, unplug that, the power shuts off etc.) Are you suggesting to remove these connectors and replace them with others? Would this require soldering? What connectors are currently attached? ATX and JST?

 

I had assumed you were trying to find mating connectors to the ones shown?
The ones I referenced do require a solder connection.
Max.

 

I had assumed you were trying to find mating connectors to the ones shown?
The ones I referenced do require a solder connection.
Max.

I'm trying to find something that can plug into these connectors then into a battery or straight into an outlet. For what's already attached, are these XT90 and Dean Charger connectors or something else? I don't know how to solder so I may be SOL on saving these parts for another project.

 

I do not think that they are "XT90".

 

You may want to consider cutting off the connector and replacing it with another of your choosing.

 

As per the ones mentioned in post #2!
Max.