Replacement battery slows down computer
Macbook Pro 15" mid 2012 (2.6 GHZ...
My computer would power off with no warning at about 30% charge left. I reset SMC and PRAM, to no avail. I read where this can be caused by cells having gone bad. I thought I would swap out the battery. I found a cheap one on Amazon and decided to take a chance. It installed easily, and charged with no problem. Showed 5 cycles. I calibrated it even though there is a difference of opinion as to whether or not this is necessary. I perceived that my macbook was running slower than before. I ran geekbench 4 and got results 1621 (single core) and 5712 (multi core), where average for my model is 3260 and 10244. I reset SMC and PRAM, no difference. I then read that non-oem batteries can cause this. I swapped my old battery back in. Geekbench 4 results, 3677 (single) and 12320 (multi). The geekbench test ran in about half the time on my old battery. I guess you get what you pay for. I plan to return the battery, but am now not sure what to replace it with. Coconut battery shows the old battery as good. It doesn't last long, but I could live with it except, the computer powers off at the most inopportune times. Any ideas? CoconutBattery with old:
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