Tuesday 30 December 2025

Lithium batteries and the myth of "Memory"

Lithium batteries and the myth of full discharge
Lithium batteries and the myth of full discharge

(I.e. Truth or Myth: Should We Completely Discharge the Battery Before Charging?

Lithium batteries are everywhere - in our phones, laptops, headphones. But how much of what we know about charging them is true? Let's clear up one of the most widespread myths once and for all!

(I.e. The Myth Everyone Has Heard

"You have to let your phone run out of battery before you put it on the charger, otherwise the battery will be damaged." Who hasn't heard this?

Η αλήθεια; This only applies to the old batteries we used 20-30 years ago! Today's batteries work completely differently.

🕰️ Where Did It All Start?

In the past, there were other types of batteries that actually had a strange "problem." If you charged them while they still had a charge, they would slowly "forget" how much charge they could hold and would hold less.

Good news: Today's lithium batteries they don't have this problem! You can charge them whenever you want, without them "remembering" anything.

⚠️ Why is the Opposite More Correct?

(I.e. 1. Every Battery Has a Limit

Imagine that your battery has a “number of lives.” Every time you go from 0% to 100%, you lose a “life.” Batteries usually have about 300-500 such “lives.”

The trick? If you charge frequently in smaller increments (e.g. from 40% to 70%), you don't lose all of its "life" - you only lose a part of it. That way it lasts much longer!

🔴 2. 0% Is Dangerous

When the battery drops below 20%, it starts to get more “tired.” If it reaches 0% and stays there for many hours or days, it can be permanently damaged!

💡 Advice: Try to never let your device shut down due to a dead battery. Charge it when it reaches around 20-30%.

🛡️ 3. Your Device Protects You

When your phone or laptop shuts down because it's "empty," it's actually hiding a little charge for safety. It never actually reaches absolute zero - it does this to protect its own battery!

How to Charge Correctly

  • Keep the charge between 20-80%: This is the “sweet spot” for longer life.
  • Charge frequently with small doses: There's no problem putting your phone on charge for 20 minutes and taking it out.
  • Don't leave it on the charger all night: Modern devices have protection, but it's better not to make it a habit.
  • Use a good charger: Prefer the authentic one or one from a reliable company.
  • Keep it away from heat: The battery hates high temperatures. Don't leave it in the sun or in a hot car.

🎯 The conclusion

The old rule of "empty first, charge later" is outdated! Today's lithium batteries prefer "small and frequent" over "empty to full".

With the right charging habits, your battery will last longer and serve you better. Don't listen to the old myths - technology has come a long way!

(I.e. Last updated: December 2025


Evangelos
✍️ Evangelos
Its creator LoveForTechnology.net — an independent and trusted source for tech guides, tools, and practical solutions. Each article is based on personal testing, evidence-based research, and care for the average user. Here, technology is presented simply and clearly.



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