Battery & Power Cheatsheet
Battery & Power Cheatsheet
Health checks, charging habits, and power plan reference.
Battery Health
| powercfg /batteryreport | Run in Admin PowerShell ߀” generates HTML report with design vs actual capacity |
| Design capacity vs Full charge | If full charge < 70߀“75% of design capacity, replace the battery |
| Cycle count | Each full discharge + recharge = 1 cycle; most batteries rated 300߀“1000 cycles |
| macOS: Option + Battery icon | Shows Normal / Replace Soon / Replace Now battery condition |
Charging Habits
| Keep between 20% and 80% | Partial cycles degrade the battery far less than full 0߀“100% cycles |
| Avoid heat while charging | Do not charge on soft surfaces that block vents ߀” heat is the main enemy |
| Use charge limit software | Dell Power Manager / Lenovo Vantage / ASUS MyASUS ߀” cap at 80% for longevity |
| Calibrate every 2߀“3 months | Full discharge to 0% then charge to 100% ߀” resets meter accuracy only |
Windows Power Plans
| Balanced | Default ߀” CPU scales with demand; best for most users |
| Power Saver | Caps CPU; dims screen; extends battery, reduces performance |
| High Performance | Full CPU speed at all times; drains battery fast; generates heat |
| Battery Saver | Action Centre toggle ߀” dims screen, pauses background apps, limits sync |