How to maintain laptop batteries?

Compared to desktop computers, laptops are a favorite among many students and office workers due to their combined performance and portability. However, like mobile phones, digital gadgets that have built-in batteries, such as laptops, also endure issues like battery aging, swelling, and diminished battery life. To restore proper functionality, some users may opt for battery replacement.

 

However, in contrast to most Windows laptops, the replacement cost of a battery for Apple's MacBook laptops outside of warranty is significantly steeper. The 13-inch and 16-inch MacBook models come in at $145 and $220, respectively. As a result of these high repair expenses, many MacBook users prioritize monitoring their battery health and strive to prolong the longevity of their devices by practicing proper usage habits.

After gathering pertinent information, it has become clear that there are differing opinions regarding the use of a MacBook while it is plugged in or after it has been fully charged and disconnected from the power supply. Therefore, what is the correct approach for daily use and how can battery aging be delayed? Prior to delving into the various maintenance methods, it is important to first examine the different types and features of MacBook batteries.

MacBook Battery Basics You Need to Know

Currently, the majority of MacBook batteries are constructed using polymer lithium ion technology, although some older models may incorporate liquid lithium ion batteries. Despite their differences, all of these batteries are classified as lithium ion batteries, featuring both an anode and cathode, as well as a separator to keep the two electrodes apart. Electrolyte materials are also present, filling the remaining space within the battery.
During the charging process, lithium ions within the battery travel from the positive electrode to the negative electrode, leading to the storage of electrical energy. Conversely, discharging causes these ions to move from the negative electrode to the positive electrode, thus generating a current for power supply. It should be noted that oxidation and reduction reactions take place during both charging and discharging, ultimately leading to gradual wear and tear of the battery.

Charging and using your MacBook simultaneously won't increase the rate of battery aging.

When a phone is being charged and used simultaneously, the power source charges its battery while the battery powers the phone, creating a mathematical balance akin to adding and draining water from a pool. However, both charging and discharging generate heat, and the phone's lithium-ion battery can be subjected to high temperatures as a result. Sustained exposure to these high temperatures may cause irreversible damage to the phone.

 

Unlike phones, when using a computer while it is plugged in, it runs directly off of the electrical supply and only generates heat when charging the MacBook battery. Additionally, once the battery reaches 80%, it will switch to trickle charging. This means that the charging process will slow down, and ultimately stop once the battery is full. As a result, the MacBook won't overcharge and create any bulging issues.

How to maintain the battery of MacBook?

1. Avoid over-discharging. Try to charge your MacBook when the battery level is only left with 20-30% or even less, and avoid using it until it completely shuts down due to low battery.
2. Avoid using MacBook in environments that are too cold or too hot. If you are concerned about using your computer in high-temperature conditions, you can use a stand or a ventilated cooling pad.
3. Whenever possible, use the power adapter, especially when rendering videos or running large software applications. The lithium ion batteries in your MacBook have a certain lifespan, but it is also not recommended to always use the battery for power supply. Charge the battery at least once a month to complete a charging cycle.
4. Use original, official, or trusted brand chargers and data cables as much as possible.

Summary:

Using a MacBook while it's charging or long-term power supply usage do not accelerate battery deterioration. Normal charging cycles within 3-5 years of product lifespan are acceptable. However, it's important to avoid overcharging, excessive discharging, and extreme environments. Users should use the power adapter, at least, for rendering videos or running large software applications. Lithium ion batteries have limited lifespan, and it's not recommended to always use the battery as power supply. Charge the battery once a month to complete a charging cycle. Finally, always use original, official, or trustworthy brand chargers and cables for your MacBook.