我應該讓筆記本電腦和手機的電池充滿電嗎,讓它們在充電前就死掉,或者介於兩者之間?


20

通常,最好是讓筆記本電腦和手機的電池在充電之前完全沒電,讓它們即使在未充電或未使用時也要不斷地插入電源,或者在充滿電後將其拔出並拔掉電源,直到發現電池為止需要合理的充電量?

現在我知道用法和規格因人而異,因設備而異。因此,我只是在尋找有關電池壽命與保持充電狀態/讓電池沒電的一般反饋。

多年來,我一直在努力決定何時插入手機和筆記本電腦。我得出了一個堅定的觀點,那就是最好在不使用時始終插入電池壽命(不使用意味著我將在今天晚些時候或明天使用它,並且它需要果汁)。這樣可以保持充滿電,同時最少地使用電池,從而延長使用壽命。這對於最小化功耗也是最佳的嗎?我有疑問

19

Of course that depends on the battery, but Lithium Ion batteries were the standard for laptop/cellphone batteries last time I checked.

A battery feels most happy

  1. being neither too full nor too empty,
  2. being not too hot,
  3. being not charged/recharged too often.

If you don't need the battery, remove it from the battery pack (at about 60%) and store it dry and cool.

If you use the battery, make sure your laptop doesn't get too hot. Usually the processor is located near the "top" of the keyboard, away from your hands, but so is the battery.

There is power management software for many laptops, which ensures that your battery only gets charged once the charge falls under a certain threshold (e.g. 40%) and then charges up to 80%. This allows you to plug in/unplug your laptop (to move location) without initiating a new charge cycle, which would lower the life span of the battery.

(A friend of mine had a broken adapter, so the battery was charged/discharged every time someone bumped into the chord. After a few months, the 2-year old battery now lasts at most 2 minutes!)

For cellphones, it's inconvenient to keep them plugged into the wall all the time, so the general guideline is usually to charge it once it falls under, say, 30% and discharge it fully, followed after a full recharge, about once a month. The same holds true for laptop batteries, of course, but I usually find myself discharging them fully more than once a month anyway.

In particular, this means that the rule (myth?) "fully discharge before charging", which applied to old nickel-cadmium rechargeable batteries, does not apply to modern laptop/cellphone batteries.


9

I read somewhere that one issue (of several) that tends to shorten the lifetime of laptop batteries is heat from other components inside the laptop. So, if you happen to not be "on the move" with your laptop all the time, but instead end up using your laptop at the same desk for several days/weeks in a row, then you should remove the battery (don't forget to turn off your laptop before you do that), and run your laptop from the mains. Then, obviously, put back in the batter when you need to take your laptop on a trip. I did that with one laptop and it seemed to prolong the life of its battery.

My most recent laptop has a battery-lifetime-extending mode in the BIOS, which, if enabled, prevents the battery from recharging more than 80%. The instruction manual claims that it is the final 20% charging of the battery that causes the most damage to the battery.