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Jacoblee23

macrumors 65816
Original poster
Nov 10, 2011
1,481
735
My 13" M1 MacBook Pro was at 96% battery capacity after only 39 cycles so Apple agreed to replace it. I think last time where I went wrong is I left it plugged in too much. I didn't find out until later on that was something that could hurt battery health. I now have a clean slate on this machine and want to conserve battery life as much as possible. Do you all have any recommendations? Thank you in advance! BTW replacing the battery requires replacing the entire top case just like previous models. I didn't know that until I got the report back.
 

macphoto861

macrumors 6502
May 20, 2021
495
442
Al Dente, which limits how high your battery charges even when left plugged in. Set it to somewhere in the neighborhood of 50-70%.
 

7even

macrumors 65816
Jan 11, 2008
1,048
79
Keep in mind also those capacity numbers are an estimate and will bounce up/down over time regardless of true degradation. I don't have this coconutbattery history anymore but I've had capacity bounce up by 5-6% even after seeming to flatline after large numbers of cycles. Ultimately drops to low 90s/high 80s after 2-3 years of regular use. Surprised they agreed to replace it tbh. For another point of reference, coconutbattery says my last laptop was at 94% after 81 cycles and still 94% after 156 cycles.

Lithium batteries do prefer stay around 50% charged so the suggestion above is probably your best bet, though ultimately I have doubts that a) 96% at 39 cycles indicates any battery problems and b) being conscious of your charging habits will swing the capacity more than a few % in either direction over time
 

white7561

macrumors 6502a
Jun 28, 2016
934
386
World
Al Dente, which limits how high your battery charges even when left plugged in. Set it to somewhere in the neighborhood of 50-70%.
This. If you're using it plugged in 24/7 and don't mind charging to 100% from 50% when you need it. Set it to 50% . I'm using 75% since it's already so good at 75% max in terms of damage on the batteries. And since it's more closer to 100% when I need to go I can use the top up button and it won't take as much time to fill it up
 

kylinblue

macrumors newbie
Nov 10, 2021
6
4
7 cycles on my 14” MacBook Pro, I left it in a room with no heat overnight and battery temperature dropped to as low as 12C (TG Pro). The estimated capacity reading from Coconutbattery was 94% despite the laptop is almost fresh new. As expected, after the laptop was moved to a warmer room and returned to comfortable temperature the capacity went back to 100%. Btw coconut will not re-read capacity value unless you reboot.
 
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