Thanks a lot Ronni. You have very kindly extended my battery's life.
Cheers, Graham Graham Rabe | Barrister & Solicitor | Commercial Litigation Consultant & Mediator Suite 94, 50 St Georges Terrace, Perth WA 6000 M: +61 417 949 825 E: [email protected] Web: www.rabe.com.au This email and any attachments may be confidential and subject to copyright or legal professional privilege. If you received this email in error, please inform the sender immediately, delete it and do not use, copy or disclose it. > On 22 Jan 2019, at 6:57 pm, Ronni Brown <[email protected]> wrote: > > Hello Graham, > Probably best for you first to have a read at Apple Support: > > About Mac notebook batteries > Learn how to optimize the life of the battery in your Mac notebook, fix > battery issues, and get service. > > Understanding batteries in Mac notebooks > MacBook, MacBook Air, and MacBook Pro computers come with lithium polymer > batteries to provide maximum battery life in a compact space. To understand > battery technology and battery life, it's good to know common battery > terminology: > Cycle count: Batteries are expected to function for a certain number of > cycles. This number represents the sum of total and partial discharge cycles > throughout the life of the battery. You can see the cycle count limit for > your computer by reviewing Determining battery cycle count for Mac notebooks > <https://support.apple.com/kb/HT201585>. > Full charge capacity: Measured in mAH (milliampere-hours), this refers to the > amount of power the battery is capable of containing, less the energy > required to shut down the device. This number lowers as the battery becomes > depleted with usage and age. > Remaining charge capacity: This number represents the current amount of power > left in the battery as measured in mAh (milliampere-hours). Using the > computer when not connected to AC power will cause this number to lower as > power is depleted from the battery. > Consumed / depleted: Consumable parts are those that deplete over time as > their internal components are used. Batteries, due to their chemical > components, are considered consumables, and over time they lose their ability > to hold a charge. If the cycle count on a battery exceeds its expected limit > <https://support.apple.com/kb/HT201585>, the battery is considered consumed. > Defective: Batteries are considered defective when they stop working due to a > defect in materials or workmanship, or due to a manufacturing defect. > Defective batteries are covered under Apple's one-year limited warranty and > extended-service contracts. > Load: The amount of activity being performed by a task or tasks. Certain > power-intensive processes place a heavier load on the battery and result in a > much-reduced runtime per charge. > https://support.apple.com/en-au/HT204054#bright > <https://support.apple.com/en-au/HT204054#bright> > ———————————————— > To summarize the key points: > When you run your MacBook Air plugged into external power and it's charged to > 100%, you're not using the battery at all – you're simply running from > external power. > You cannot overcharge your MacBook Air battery. The charging circuit cuts off > when it hits 100%, at which point it runs from external power. > The life of a rechargeable battery is measured in cycles. One full discharge > and recharge is a single "cycle." Discharging to 50% and recharging is 1/2 of > a cycle, and so forth. > If you don't discharge your MacBook at all, you're basically using zero > cycles, which will obviously extend your rechargeable battery life when you > do need it. > The only caveat is that you do need to do one complete discharge/recharge > cycle about once per month to "exercise" the battery. If you leave your > MacBook plugged in all the time, it's pretty much the same as leaving it OFF > all the time, since the battery doesn't get used at all. > This "one complete cycle per month" can be cumulative -- it doesn't have to > be a time when you drain it zero and recharge it. Draining it to 80% five > times per month, or 90% ten times per month would still count as a single > cycle. > In summary, you don't need to sweat too much about battery life. Leaving your > MacBook Air plugged in most of the time will not hurt your battery life, as > long as you're not leaving it plugged in ALL the time. > Work from your couch :)) for a few hours without plugging in a couple of > times per month and that's really all you need to worry about. > > Cheers, > Ronni > > Ronni Brown’s iPad Pro 12.9-inch 256GB > > > On 22 Jan 2019, at 5:39 pm, Graham Rabe <[email protected] > <mailto:[email protected]>> wrote: > >> Hello WAMUGers, >> >> What is best practice when it comes to charging Apple laptops? When at home, >> should I just leave the charger plugged in all the time or would that not be >> a good idea? I remember Ronni’s tips about charging the phones (keep level >> between 40% and 80% - and regular charges to that end better than getting >> too low and then ramping up to 100%). For example - is leaving the charger >> plugged in on the laptop for 3 or 4 days a no-no? >> >> Cheers, >> >> Graham >> >> Macbook Air 2017 >> Mojave 10.14.2 >> >> >> >> >> Graham Rabe | Barrister & Solicitor | Commercial Litigation Consultant & >> Mediator >> Suite 94, 50 St Georges Terrace, Perth WA 6000 >> M: +61 417 949 825 >> E: [email protected] <mailto:[email protected]> >> Web: www.rabe.com.au <http://www.rabe.com.au/> >> >> This email and any attachments may be confidential and subject to copyright >> or legal professional privilege. If you received this email in error, please >> inform the sender immediately, delete it and do not use, copy or disclose >> it. > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
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