The "Lithium-Ion" Myth
You might have heard: "Let your battery drain to 0% before charging." This is outdated advice from the 90s (Nickel-Cadmium batteries).
Modern Lithium-Ion batteries hate hitting 0%. It chemically stresses the cell.
- Best Practice: Keep your battery between 20% and 80%.
- Avoid: Leaving it plugged in at 100% for weeks (like a laptop that never moves). This causes "battery swelling."
What is "Vampire Drain"?
If your laptop loses 20% charge overnight while "sleeping," you have vampire drain.
- Windows: Instead of "Sleep", use "Hibernate". It saves your work to the SSD and cuts power completely.
- Mac: Check "Wake for Network Access" in System Settings and turn it off.
Pro Tip: Extreme temperatures kill batteries. Never leave your phone or laptop in a hot car in summer. Heat causes permanent capacity loss that cannot be fixed.