All I needed to provide ComputerCare was the model number and serial number of the laptop, and they ordered the appropriate replacement battery. The good folks at ComputerCare in Seattle kindly ran some diagnostics on my laptop and quickly identified the battery problem, which would unfortunately require a replacement. I’d recommend trying that first if you’re having similar battery problems (link to Apple Support’s SMC reset instructions here), but it didn’t work for me, so I knew it was likely to be a battery hardware issue. When I saw a ‘service battery’ message pop up, I was naturally a bit more concerned, so I tried resetting the System Management Controller (SMC) to see if that would help. Even then I was only getting a couple of hours out of it without the power cord. It wasn’t terrible, but it was enough that I’d try to extend it by turning off Slack and lowering screen brightness. But at home, where I also frequently use my computer, I noticed a sudden drop in battery life over the past couple of months. Like many people, I generally have my laptop’s AC plugged in when I’m at the office, so battery life is never an issue. Old battery: Only 2 hours on a full charge
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