Something that has been pressing on my mind is the portable-ness of this smartwatch, or should I say the lack of for this project so far. 

So far, in order to hear the music playback, you must either use headphones with a 3.5mm jack (though this only works for a Raspberry Pi Model that has a headphone jack), or it has to be connected to a TV and played through HDMI. Not very 'elegant'. 

Then there is the power side of it, it needs to be constantly connected into the mains plug socket, so its portable-ness is determined by the length of the micro USB cable you have. 

I want to over come these barriers. The main reason for why, is as part of this University Project, I have to give a presentation on it, during which I don't want to be constricted to the wall with one wire, and connected to the TV so hear the sound by another. That is completely defeating the point of the wearable tech, 'watch' form factor of the project. 

So I've been researching possible methods to do this. Giving the watch a rechargeable battery seems easy enough, I've found some components on Pi Hut which should do the job, and some googling helped me figure all this out, seeing what other people had done etc. The hardest part has been a speaker system for it. As the screen uses all my GPIO pins, thats the main method from what I can tell and most used from reading online forums etc which is used to connect the pi and give it some speakers etc. So I can't go for the straightforward pHAT offered by PiHUT. 

But then I came across this:

https://learn.adafruit.com/pigrrl-2/overview

A guide by adafruit for building a retro gameboy type device using the Raspberry Pi. More importantly, it used a rechargable battery system and speaker system, along with a touchscreen. This is my answer.