New battery installed.
Charges up to 100%, runs down to 50% then suddenly instantly drops to 7% and stays there for about 2 hours. Battery seems to continue to work but metering is wrong. Tried all the usual tricks (Battery conditioning, SMC, PRAM, NVRAM, Reboot, Reinstall MacOS…etc) with no solution in sight.
Any ideas? Just a crappy battery?
Apple asked for $700USD for a replacement so I bought an aftermarket one for 1/10th of the asking price.
MacBook Pro Retina 15″ (Mid-2015) New battery has weird metering
batterymacbook pro
Related Solutions
Reboot. Create a new user. Try.
If the battery life is still short after a couple of days under a new account and there's nothing weird. Take it back to an Apple store. They will run the hardware test and determine if there's a problem with the battery. Be nice to them. Explain them that you know what you're doing, that this is unusual, that you know how to take care of a battery, that it suddenly started happening and that you would like for a Genius to take a look at it.
I did that with my Macbook Air 11 (with a 8 month old battery that just died out of nowhere) and they kindly replaced it.
Better safe than sorry.
Best is to use Apple tools already on your Mac to check your battery.
Open Activity in utility folder- and look under the the Energy tab.
Next, open About this Mac- More- sys report:
Look for battery information there.
It should show something like:
Fully charged capacity (>6500 mah), --that is a good indicator how "old" is the battery, the older they get the lower is the Fully Charged capacity number.
Look at the charge cycles (<5)- a good indicator how many times the battery was charged, with normal life been 1000 Cycles (or 3-5 years)
Best Answer
It seems you have already tried all the things that can be recommended in your case. I would assume your battery is faulty.
For anyone else with this model reading the thread: if you do have a Mid 2015 MacBook Pro your battery might be eligible for free replacement unter a quality program: https://support.apple.com/15-inch-macbook-pro-battery-recall
You could check for the QP as well Vaultnaemsae, but chances are Apple is going to decline coverage as you already performed unauthorized service on the machine (and your Apple battery is no longer a threat as you took it out, which would be the whole point of Apple replacing it free of charge.)