Describe the differences between a positive and negative charge

Everybody knows that positive charge is due to protons and negative charge is due to electrons, but what does the charge mean?

Why were negative and positive charges so designated?

Was it also a possibility to call the charge of an electron positive and the charge of a proton negative?

A differences between positive and a negative charge is that a positive has more charges then a negative

Explanation:

say if you have a batrry with a negative charge it will not work