Anyone who went trough a bad day knows that those days are usually the ones when our cellphone battery decides to  go dead on us.

Since most of our life nowadays depend on the battery indicator, and since most of us spend a lot of time moving around in the car, I think a charger is one of the must have items on your car

There are not many things to look for here, but I would focus at least on these to stat with.

1. Small: Just because, and for obvious reasons
2. Light: you want to know when it is charging and when it has finished
3. Try ir to be car friendly i.e. try to buy something you can integrate to the car

So, there is not something to recommend here, mainly because you’re going to want to search for something somewhat specific, but a good place to start is a Try on Amazon