Grant Bennet-Alder wrote:
That computer is a battery-CAPABLE device. It is not optimized as a battery-operated device. (It is NOT an iPhone.)
I never argued that this is a battery-optimized device like an iPhone. Please fight your straw man elsewhere, this is a forum for people looking for help.
I think it is very disrespectful to ignore legitimate concerns. I work on a battery management software and I have a pretty good idea of what might or might not be normal. It is clearly NOT normal to lose a cool 10% of the battery capacity by cycling only 30 times for a battery rated for up to 80% capacity after 1000 cycles.
Your computer performs best when connected to AC power. It can use the full output of the Power Adapter AND when doing especially challenging work will also freely "borrow" power from the battery. In some cases, even with the power adapter connected, the charged state may decline during stressful work.
You are making assumptions. I use my laptop plugged in 90% of the time! I have a 85W charger and even when both CPU and GPU pushed to the max (via stressful hash calculation work), the charger can continue supplying enough power to run the laptop AND continue charging the battery -- even without the "Low Power Mode".
As I mentioned, "Low Power Mode" is also ON and in this mode, the laptop can attain only a fraction of the maximum energy consumption. So, no this cannot explain why 10% of the battery capacity is lost.
When used only on battery, your computer has no extra cushion of power, and may perform more slowly. However, for ordinary non-stressful tasks this may not be objectionable (possibly not even noticeable.)
Again, I rarely use my laptop with battery only (and the low battery cycle count is an indication of that, 30 << 1000).
Clearly, 10% battery capacity loss is noticeable from the amount of time I can use my laptop without plugging it in - there is an hour or so difference! Who wouldn't notice missing an hour or so over 12 hours?
I noticed it immediately after I needed to use my laptop unplugged for an extended duration of time yesterd. When I check the duration, I realized that it was less than what it used to. Which led me to check the state of health of the battery and as you can see from the screen-grab, it is deteriorated (even with "Low Power Mode" in ON , "Optimized Battery Charging" in ON and almost ALWAYS connected to AC power). The laptop battery cannot be under less stress than this; do I need to cuddle the laptop and massage the back of its battery?
Your MacBook Pro uses ‘smart charging’ to charge in the optimum way, and only when necessary. Plugged in is Not necessarily actively charging. There is substantial hardware and software cooperating on battery and charging issues.
As I mentioned in my original post, the "Optimized Battery Charging" option is also ON. That is, the OS should learn from my usage and stop charging around 80% so that the battery won't deteriorate due to high SoC very quickly (but since Ventura upgrade, it very rarely and randomly stops at 80% even though it is almost ALWAYS plugged in).
In general, you should ALWAYS connect AC power when it is possible to do so, and only run on batteries (which could be somewhat slower) when no AC sources are at hand. Your Mac will NEVER over-charge.
I never talked about "over-charging", not sure whats that got to do with the price of onions in China?
