NIFTY!
I am a safety nut so I wear a neon orange helmet to be blunt. So far no one has killed me because of that helmet and I hope that continues to be the case.
I like the idea of being visible out there and especially at night.
So I am sharing what I did to add a 12v outlet to my "Chinese" 150cc GY6 scooter as an example to adding any new circuit off the battery.
First whatever you add needs a fuse. Simple but true. A simple glass 15A fuse and holder will do.
Second a switch is needed!!! No matter if you think it doesn't need one or not you really need to have a switch so you never have a dead battery.
Now many people will assume that electricity flows form the positive to the negative but that is not true. If you do not know what Positive or Negative are
https://en.wikipedia.org/wiki/Direct_currentPlease do not be discouraged! Electricity is simply electrons bumping each other in some kind of conductor like metal or your body for example
Silly joke but serious at the same time... Still don't be discouraged read on.
So now that we have an idea what we are doing on direct current electrons are attracted to the POSITIVE terminal of the battery from the NEGATIVE terminal of the battery so we want to "wire-in' a switch to "break" or disconnect the flow of electrons with the POSITIVE wire.
By wire or POSITIVE I mean we must connect both the positive and negative to the device we want to power with wires.
We want to be sure that if something is wrong such as the wires are somehow shorted to each other "short circuited" that we have a safety and that safety is a fuse. A fuse
https://en.wikipedia.org/wiki/Fuse is a device that detects too much electrical flow and burns itself out thus breaking the connection.
So we want to be able to turn on the power and turn off the power to anything we wire into our scooters seriously!
Switch! fUSE!
I have added a 3 socket 12V outlet into my 150cc Scooter so I can have USB power and 12V power.
It is in the glove box of "Tweety" my lil' 150cc Chinese scooter. It has "backlit" LED so it cannot be on all the time and I wired in a single pole single throw switch
https://en.wikipedia.org/wiki/Switch breaking the POSITIVE wire connection.
So when i need to charge my phone or use the 12v for something I must switch it on. If not that the battery would drain with that backlit 12v unit.
I can be of help with electrical of the simple nature.
Ernst