Should I let my battery drain fully ?

Lithium-ion battery

Lithium-ion batteries are inside every iPhone, iPad, iPod, Apple Watch, MacBook and nowadays computers. Compared with traditional batteries, lithium-ion batteries charge faster, last longer, and have a higher power density for more battery life in a lighter package. When you know the way they work, you can get much more of them…

According to Apple, Macs’ lithium-ion batteries can hold up to 1000 cycles of recharges / charges. For average use, it can represents 5 years of use. Of course, for intensive use, the battery will take less time.

What should I do to save the Mac’s battery and use it slower?

Well… laptop design is an exercise in compromise. The more you’re revving your processor by editing videos, decompressing huge files or playing graphically intense games, the more you’ll fall short of that 10 hours.

Moreover, the people who tell you to unload and recharge the battery all the time are wrong. This was valid with the old battery models of the early 2000s that suffered from the memory effect. Today this phenomenon does not exist anymore with newer products like computers or telephones …because this will cause the opposite effect: the number of charge cycles used will increase and the battery will wear out faster … People who tell you that batteries should never be charged or discharged are also wrong, because a battery still needs regular chemical movements in order to function optimally. So just do it once in a while (let’s say once every 2 weeks).

All batteries of the current generation are equipped with a high-loaded load controller to avoid problems (typically once at 100% it cuts the load and takes it back only after a short drop). The computer will automatically stop charging the battery before reaching the critical load that could cause the battery explosion.

If you rarely use the Mac, be sure to charge / discharge the battery at least once a month. The electronics usually need to be calibrated and therefore, at the first charge, a complete charge / discharge cycle is required. This allows the electronics to learn the changing limits of the battery.

What should I do if I need to use my MacBook on battery for a long time?

  1. Lower screen brightness
  2. Turn off Bluetooth if you do not need it
  3. Turn off WiFi if you do not need it
  4. Turn off the keyboard backlight
  5. Quit unnecessary applications which are still running

At least, the best treatment of a lithium battery is to never worry about it. One more advice though, never leave your Battery discharged for a long period of time.

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