![]() ![]() Charge them up: copper plates out as nucleation sites, then lithium whiskers begin growing whenever the battery is charged. ![]() The battery controller thus disables the battery pack - but this can sometimes be reversed by "jump-starting" the pack. Once an individual cell discharges below (IIRC) 1.4V, the copper anodes start to go into solution. When ordering a replacement battery, beware battery packs that were manufactured around the same time as the original.Īlso beware "jump-started" LIon batteries. Your battery cells are worn out and need to be replaced. Is it hot? If so, I will suggest treating this as a potential safety or equipment damage issue. Suggested: feel the battery, especially just before and after charging, and perhaps 15.30 minutes in. The controller may have failed to properly track charge, or to update its estimated charge capacity as quickly as it has degraded, OR the battery may be self-discharging. Due to the very flat discharge curve of LIon cells, charge is estimated by measuring the charge flowing into and out of the battery, and estimated charge capacity will be updated over time as well. So, what can I do so my Mac dies at 56% instead of 70%~?ĭistinguish your battery cells actually holding that amount of charge from the battery controller IC's estimate of charge, which appears to be off. When I "overcharge" it at 100%, turn off the charger it takes significantly longer to get from 100% to 99% if I were to just stop charging directly when 100% is reached. I have also forgot to mention this, but when my Mac reaches 100%, Coconut Battery says it can still be charged, and it actually can. I'm not sure about getting a new battery, as I may be getting another Macbook later this year, so blowing $100 on a new battery for a 6 year computer I may not use for a long time is not a financially smart decision. I have tried resetting the SMC twice and it did reset (indicated by power adapter turning green then orange) but had no effect on the battery. I've also noticed a bunch of battery glitches in the top menu, and whenever I charge it'll show me 45% then quickly switch to the 'real' percentage.īefore someone tells me to 'reset your SMC', I will point this out: System Report > Controller returns that there is no controller. Recharging boots it up and shows me anywhere from 64% to 75% battery left. Note that on Mojave, if it did survive the 8 hour nap then it woke up immediately and I store my Mac in a cool place, the bottom feels slightly warm. When I opened it after it's 8 hour break, it shows me the login screen (takes a couple 4-5 seconds to wake up). On HS(10.13.6), the battery used to die at around 30-40%, which to me isn't as bad. I have 2 desktops with dynamic wallpaper (changes throughout the day), and most of the time I leave my Mac asleep (8 hours~) to reopen it, the trackpad is hard: Macbook is dead. I've recently started to notice a decline in my battery when I decided it would be a 'good' idea to upgrade to Mojave. Has lasted 3,268 cycles, and the battery status is apparently 'Fair'. My 2015 Macbook Pro Retina shuts off without any warning when the battery discharges to 75%. ![]()
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