Chosen Solution

I need to know which is the positive and negative on battery and charger port Cause I don’t have a charger for it

Sounds to me like you’re planning on rigging something up to destroy your MacBook (which runs on direct current).

Pin 1GND (0 V) Pin 2V+ (14.5 / 16.5 / 18.5 / 20 V DC) Pin 3Charge control pin Pin 4V+ (14.5 / 16.5 / 18.5 / 20 V DC) Pin 5GND (0 V) Get a real Apple MagSafe charger!