Battery advice on the internet is 60% folklore. Below are the nine tips that hold up under real testing.
1. Lower screen brightness to 50% or use auto
The screen is the largest battery consumer on any modern phone. Going from 100% to 50% brightness saves roughly 30 minutes per charge in our testing.
2. Turn off "Always-on display"
The AOD costs 5–8% battery per day. If you can live without seeing the time on your locked phone, this is free range.
3. Set background app limits
On Android: Settings → Battery → Battery usage → identify top 5 apps → tap → "Restricted." On iPhone: Settings → General → Background App Refresh → turn off for non-essential apps.
4. Use dark mode (only on OLED phones)
Dark mode genuinely saves battery on OLED screens (iPhones from XS onwards, most flagship Android phones). On older LCD phones it makes no difference.
5. Disable 5G when unnecessary
5G uses more power than 4G, especially when signal is weak. On most phones: Settings → Mobile data → Preferred network → 4G/LTE. Switch back to 5G when you need fast downloads.
6. Charge between 20% and 80%
Charging from 0% or to 100% accelerates battery wear. Most modern phones now have an "optimized charging" option that handles this automatically.
7. Don't kill apps from the recent apps drawer
This is the most popular battery myth. Force-closing apps actually wastes more battery (the app has to fully relaunch later). Just leave them.
8. Cool the phone
Heat is the single biggest killer of long-term battery health. Don't leave the phone in direct sun or in a hot car.
9. Replace the battery after 2-3 years
Lithium-ion batteries chemically degrade. After 500 charge cycles (about 18-24 months of normal use) capacity drops to roughly 80%. A $30-50 battery replacement extends a phone's life by 2-3 years.