[ GLOSSARY DEFINITION ]
Battery
watt-hour
The unit (Wh) used to express laptop and larger battery capacity.
Also known as:
Wh
Full Definition & Technical Explanation
The watt-hour (Wh) measures stored energy as power delivered over an hour, and is the standard for laptop batteries. Because it accounts for voltage, it compares capacity across different batteries more fairly than mAh.
See milliamp-hour.
Where watt-hour Matters
Smartphones
Laptops
Frequently Asked Questions
What is watt-hour?
The unit (Wh) used to express laptop and larger battery capacity.
What terms are related to watt-hour?
Related Battery terms include solid-state battery, milliamp-hour.