I’m at the Apple Store to investigate why my battery on my 2014 MacBook Pro looses charge so quickly. I remember it dropping quickly from 100% down to 50% and also quickly from 50% to 0%. I remember the battery icon telling me that my battery is damaged and needs immediate replacement. However, I now appear to be in a universe where my notebook battery is ok. Diagnostic testing of the battery now shows it is fine at 84% of new status. I’m testing it now myself to see how fast it discharges. In the last 20 minutes, with only Safari opened, it has gone from 88% (at 14:15) down to 78%.
My understanding of battery technology is once a battery is degraded, it doesn’t magically get better. If it were possible to improve degradable batteries by just surfing to a universe where they were not as degraded, then I imagine at least one classical law of physics would be broken in the process.
Officially, my MacBook Pro battery should last 10 hours for normal web browsing. This does appear to be degraded as I type this because the charge is down to 68% at 14:50, so down 20% in less than 40 minutes.