direct current

Hi all, I'm hoping someone out there has the knowledge and/or experience to answer my query or at least point me in the direction of someone who can! I've tried looking into this using a website called 'Google' (if you haven't heard of it, it's a bit like AskJeeves, but will probably never catch...

I got a Tesla recently and it's motivating me to try to see if i can do some VR gaming on the go (not while driving of course ;)). My plan is that I will obtain or build (around 200x 18650s) a ~2kWh power bank that I can keep in the car, and it can trickle charge from the car's 12V battery, and...