From Scratch, from a speaker & battery

I discovered this little gem on Amazon.

My kids recently killed my old TonUino, which I never put a battery in, just ran it using a USB cord with a battery pack.

https://www.amazon.com/dp/B08DN9WQLF?psc=1&ref=ppx_yo2ov_dt_b_product_details

This little speaker was BUILT to be a TonUino. I can’t believe how amazingly perfect it is. I’ve already gotten my DF mini in the place so it fits snug up to the slot and I’m going to get the buttons lined all up for my use.

This mighty little unit comes with an 18650 battery so I was considering taking the leap and powering through that.

I know I need a battery shield…but was wondering if one battery is going to work. It looks like it could, but others say only in parallel.

My components that I have salvaged are
-Ardunio Nano (I have an uno and a pro mini if need be)
-speaker
-DF mini
-buttons
-RFID reader