Click the Apple icon from the menu bar and choose the "System Preferences" option. Here, go to the "Dock & Menu Bar" section. Now, from the sidebar, choose the "Battery" option. Here, click the checkmark next to the "Show Battery Percentage" option. And voila, you'll now see the battery percentage next to the battery icon in the menu bar! 2 Answers. Sorted by: 1. 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. So I built my own battery: I replaced the battery cells. I found a bad wire on the battery so I renewed the bad contact. It's been 2 days and sometimes the battery works a little. I think the MacBook Pro 2011 is not a good MacBook Pro. It has a lot of problems. My Macbook Pro 2012 works very well. My Macbook White 2010 works perfectly. Check for visual signs of battery age, swelling, or leak. Swollen batteries may manifest as difficulty in using the trackpad or the keyboard. As the battery expands, it exerts upward pressure on the underside of these components. If you need to, you can replace your MacBook battery with a quality-tested unit from our store. DEVICE: Macbook Pro, Retina display, 13" production mid 2014 with Mojave OS. ISSUE: All of the sudden battery shows "Replace Soon". FIX: Clearing the SMC ( How to reset the System Management Controller (SMC) on your Mac - Apple Support) After that, my battery shows as normal, without any issues. I suspect an issue with the Mojave OS when 1. Charge your battery up to 100% until the MagSafe cord LED is green. 2. Disconnect the MagSafe cord and run the system all the way out of batteries. 3. Put the computer to sleep (5 hours) to finish discharging the batteries charge. quality replacement from reputable maker IF they still could get original OEM. part from Apple store; for those others, the calibration instructions may help. For general Mac notebook batteries, this covers most support topics & links: {Later models do not use MagSafe power adapters; USB-C/Thunderbolt3.1 adapter. Battery replacement on the MacBook Pro 2015 is quite simple. I gets more complicated in newer models. If the system overall is in good condition and serves your needs, I would not hesitate. Using the Open Core Legacy Patching system, you can run the latest macOS Ventura on it. Make sure, you get quality batteries. .

macbook pro 2015 battery change