Follow these steps to access information about your Mac laptop battery, including its cycle count: Hold the Option key and click the Apple menu , then choose System Information. Under the Hardware section of the System Information window, select Power. The current cycle count is listed under the Battery Information section.
Considering the last MacBook I owned was a 2008 basic (the one in the classic white shell), the 8-12 hours I’m getting is a godsend. I’ve gone a whole 12 with basic tasks and about 8 hours of nonstop movie watching and gaming through a PS1 emulator. I bought it last month refurbished from Apple so the battery is either fresh or close to it
Up to 18 hours of battery life. Go long The displays on the 13‑inch and 15‑inch MacBook Air with M2 and the 14‑inch and 16‑inch MacBook Pro have rounded
Find out how to determine the number of cycles your Mac laptop’s battery has. MacBook Air (Late 2008) MacBook Air. 300. Learn more.
Most current Macs (MacBooks, MacBook Airs, and MacBook Pros) use batteries assessed as having 1,000 battery cycles. That’s pretty much good enough for at least three years of regular use. Older Macs (including the original MacBook Air) carried batteries with just 300 cycles inside.

You need to restart your computer to complete the process. 2. Reset Your Mac's SMC and PRAM. Resetting your Mac's system management controller (SMC) and parameter random access memory (PRAM) can solve a multitude of issues with your machine. One of these is reduced performance when running on battery.

Besides screen brightness, your problem is Chrome. Google "Chrome battery on MacBook". Switch to Safari and be amazed. Also switch to low power mode. There is a thread on here where I posted my battery log for a very long day of usage (like 12 hours) and ending the day at 48% on low power mode.
Austin, TX. Apr 7, 2021. #5. Check the Energy tab in Activity Monitor and sort by "12 hr Power" to see what application had the largest impact on your Mac's power consumption. You can also click the battery icon in the menu bar at the top right to get a quick glance at what is currently draining the battery the most.
Tips for MacBook Air and MacBook Pro. Depending on how long you store your device, it may be in a low-battery state when you remove it from long-term storage
KjEn.
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    • how long does a macbook air battery last