The \"40\u002F80\" Rule made easy.
Battery Hero tells you when to start and stop charging your laptop using the 40\u002F80 Rule. Keep your MacBook in tip top shape.
The 40\u002F80 Rule:
The latest research reveals that keeping your battery between 40% and 80% is the best way to keep it at its healthiest:
* Snooze notifications
* Always have plenty of charge
* Improves overall battery health