Laptop battery wisdom
Laptop battery wisdom
I recently discovered that reducing the charging limit to 90% instead of 100% can significantly prolong a smartphone battery's life. I wonder if this applies to laptop batteries as well? If it does, what methods are there to cap your laptop battery's charge at 90%? I own a Lenovo Idea Slim running Linux Mint.
The lifespan of a smartphone battery can be significantly improved by restricting charging to 90% rather than 100%.
Source?
=> multiple comments on Google:
Why Limiting to 90% is Beneficial:
Reduces Stress:
Charging from 80% to 100% requires higher voltage, which causes heat and accelerates chemical aging.
Prevents "Saturated Sponge" Effect:
Keeping a battery at 100% for long periods is like overloading a fully soaked sponge, damaging its ability to hold a charge over time.
Extends Lifespan:
While modern phones have built-in protections, limiting maximum charge (e.g., via Samsung's 85% limit or iPhone's 80/90% limit) keeps the battery healthier for 3+ years.
Key Considerations & Best Practices:
80% vs. 90%:
While 90% is better than 100%, 80% is considered the "sweet spot" to minimize degradation.
Convenience vs. Longevity:
If you need maximum battery life for a long day, charging to 100% is fine; the degradation is gradual, not immediate.
Best Charging Habit:
The best approach is often keeping the charge between 20% and 80%, avoiding both extreme low and high percentages.
Use Built-in Features:
Use
Apple's "Optimized Battery Charging"
or
Samsung's "Protect Battery"
settings, which automate this process.
For most users keeping a phone for more than two years, using a 90% or lower cap is a worthwhile, simple practice to maintain battery performance.
A link:
https://www.reddit.com/r/samsung/comment..._90_or_95/
There is a dedicated app from Lenovo (called Lenovo Vantage) to adjust charging levels, but that does not work with Linux
Human input or artificial intelligence?
In most cases, yes. With the latest battery advancements, around 80-90% is accurate.
For example, my Surface Laptop sets the default to 80%, and will alert me when it drops to 20%.
However, this isn't an absolute rule to stay below a certain percentage.
It's possible, though batteries are replaceable components that tend to be affordable and straightforward to swap out. For instance, with AppleCare on an iPhone or MacBook, you receive a complimentary battery replacement when it falls below 80%.
And you must also consider how often you’ll need to use the device, as well as how simple and affordable it is to replace. For this laptop, the cost is around £30-40 and about 10 minutes to swap a battery. With a significant drop in performance—say 10 to 20%—the extra six months won’t justify the expense. It’s different from AirPods, where you can easily change batteries; here, the 20% underuse doesn’t add much value when they charge so fast, taking only five minutes for an hour of lost time with a 80% capacity instead of full 100%.