Chosen Solution
I recently replaced the battery in my MacBook Pro (Retina, 15-inch, Mid 2015) with a battery I purchased from iFixit. This computer model is also known by other names/idenfitiers, all of which are shown at the iFixit link below: https://www.ifixit.com/Info/ID-your-Mac/… After installing the new battery, which went off without issue, I followed the recommended calibration procedures set out in the iFixit battery replacement guide. Now, the battery charges and discharges fine, and I’m satisfied with the lifespan of the new battery. However… I’ve encountered a significant problem since replacing the battery. If I shut down the computer, or allow it to sleep by shutting the lid for a while, upon turning it back on I get a low power indication (see photo below): https://imgur.com/a/oUwVmMZ I find the only remedy when this happens is to plug the computer into its AC adapter, at which point it’ll turn on just fine. Every time I’ve done this, though, I discover the computer still has ample battery charge left when it turns on. I’m not talking 5 or 10%, it’s always been 50%+. I’m so confused as to why this is happening. Why will the computer run on battery power just fine, but needs a “jumpstart” from the AC adapter to get going? I’ve tried resetting PRAM and SMC, and the issue has not resolved itself. Any suggestions you may have are much appreciated. Thank you! — [Edit]
— [Edit 2]
@bmoran - I don’t see anything here with the battery other than the charge level is low which just means you need to live it plugged in a bit longer. Are you sure you had at least 1/3 of the battery charged when you noted the system going to sleep? Are you using the original SSD that came with the system or did you upgrade it? If you did what did you put in (make and model)
