Another option always on the table is to use the same Handwavium™ that runs the STUN suits, if you don't want to deal with the constraints of modern day technology.
Battery and energy storage is the main problem in tech besides, y'know, getting the concept to work. Scientists have figured out how to create gems from nuclear waste ( !!!!) which themselves emit energy. Can create wearable computers and other tech with it and its gonna be neat
"In the original Carmen looks like a man. The original episodes all end the same, the new one has more characters, they all end differently and the art style is better"