Should a laptop battery stay between 30 – 75% charged?

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battery
Laptops
MacBook
So I have a friend (who works in the tech industry) and he told me that laptop battery should be charged within the 30% - 75% range. He also said it's terrible to fully load the battery or to have very little battery. First off: Is that true? Second: Could I possible do this on a MacBook? He was a laptop that's always within that range.
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It depends on what the make up of the battery is like NiCad or Lithium ION and the age of the battery. When you start losing use time on a full charge then it’s time to replace the battery. I have had mixed results with both types. I have 1 lap top about a year old. I run it plugged in about 90% of the time as I am on for longer than the battery would last. IF I run it on the battery I get about 3 hours max use and even less if I am gaming.

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  • TheRealRaven
    The 'Answer' is generally correct, especially in noting that differences exist between types of batteries. Without knowing the type, a truly good answer isn't possible. About the best that can be said is that "30 - 75%" is a reasonable range to work within.
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  • Subhendu Sen
    That depends on battery type. Today's modern laptops have built-in mechanism to mange power by various tricks. In general, the percentage that you mentioned is mostly OK for modern laptops. As you asked for Mac, the same concept can apply.
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  • bhannah
    There is a term here that comes into play and that is called Battery Memory. This term is applicable to both NiCad and Lithium Ion Batteries. They both build up a memory to charge and discharge points especially when the battery is being constantly charged and discharged on the AC adapter. Most of the good laptops have display of Battery Life (Charge Amount) that the battery has in it, and it also will display Time to full charge when the adapter is plugged in. This is where the battery memory comes into play. if the battery is not fully discharged, and then fully recharged then the battery starts to remember these points and it will show that, by the amount of time (battery life) that it has available when it is not running on the adapter. Running on the adapter constantly will shorten battery life considerably. 30 to 75% is a good playing field, but when the battery will only take a 30% charge then it is time to replace the battery.
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  • TheRealRaven
    There is a "battery memory" associated with both Ni-Cad and Li-Ion batteries, but the memory works very differently in each. In order to know the 'best' handling, the type needs to be known.
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  • Subhendu Sen
    Moreover you did not reveal is this a new one or old laptop. If it is new laptop and under warranty, it is better to ask an authorized service center for help. Also specially Mac there is an option/built in feature to check battery health, in this way you can gather knowledge for battery issues.
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