[fatjoez]

The Battery Charger Idea is fine if you REALLY wanna get that protective lol
The truth is though as long as your battery has a decent charge & your car engine is running (as a failsafe for the battery) you should be fine...

The Write To ECU part only takes about 30 seconds or so,
your car battery is free to die anytime except then lol

So yea in general, for the average coder, if your battery's okay,
just start the car & get on with it

OR if you are in europe / have a local coder yeah sure pay them to do it.
I didn't have that luxury haha

But all in all it was a good experience and I'm more than comfortable with coding now as anyone else who has done it will be