My friend gave me his laptop which is Apple laptop A1286 (MacBook Pro 15") with the charger but the head of the charger was cut. I tried to charge with another charger but, it doesn't charge.
Now, I want to remove the battery to charge it with external charger. What I mean is, to use the original charger and use the the (+)wire to the positive side in the battery and the (-)wire to the negative, but when I removed the battery I found many black wires and I didn't know which ones are positive/negative.
If anyone can help me with this issue or any way to charge the laptop without using the home of the charger on my laptop?
If I will charge the battery I will be able to reconnected again and check if it will work or the motherboard is damaged.
Best Answer
The positive (+) and negative (-) terminals on the battery are usually the outermost pins. Knowing the specific MacBook model is helpful here.
The MagSafe 1/2 charger outputs 16.5 volts, so you are going to need a charger that supplies that amount.
Now, with all of that said.....
I highly urge caution in attempting to hack a DIY charger for your MacBook Pro battery.
If you don't have the necessary electronics diagnostic/repair skills, this is not something you should be attempting. Besides, there is a more safe and reliable way to diagnose your problems...
You don't need a battery to test out your MacBook.
If you have a MacBook (any model - Pro, Air, etc.) that will not turn on even with the battery disconnected, the problem is with the DC-In board or the logic board itself. And even before you begin this diagnostic journey, you need to make sure that the MagSafe charger you are using is functioning properly. A dead AC adapter won't charge any battery regardless if it's in the laptop or not.