The watt-hour is a unit of energy equivalent to one watt (1W) of power used during one hour. It is calculated by multiplying the number of amps by the battery voltage. The higher the Wh number, the longer the battery will last using the same application. Batteries will lose efficiency over time, so don’t expect a 2010-era MacBook battery to still have the same power as when it was new or more than a 2026 model, even if it originally had a higher Wh rating.
Read How to Test a MacBook Battery: See if It Needs Replacement and Replace It.
Our list includes older MacBooks that used an Intel processor and goes all the way up to the latest M-series MacBooks (e.g. M1, M2 Pro, M3, M4, M5, M6). The MacBook Neo with its A18 Pro chip starts us off.
MacBook Neo Battery Capacity
- 13-inch MacBook Neo, 2026: 36.5 Wh
MacBook Air Battery Capacities
11-inch MacBook Air (Intel)
- 11-inch MacBook Air, Intel, Late 2010: 35 Wh
- 11-inch MacBook Air, Intel, Mid 2011: 35 Wh
- 11-inch MacBook Air, Intel, Mid 2012: 35 Wh
- 11-inch MacBook Air, Intel, Mid 2013: 38 Wh
- 11-inch MacBook Air, Intel, Early 2015: 38 Wh
- 11-inch MacBook Air, Intel, Early 2015: 38 Wh
13-inch MacBook Air (Intel)
- MacBook Air 13-inch, Intel, Mid 2009: 40 Wh
- 13-inch MacBook Air, Intel, Late 2010: 50 Wh
- MacBook Air 13-inch, Intel, Mid 2011: 50 Wh
- MacBook Air 13-inch, Intel, Mid 2012: 50 Wh
- MacBook Air 13-inch, Intel, Mid 2013: 54 Wh
- MacBook Air 13-inch, Intel, Early 2014: 54 Wh
- MacBook Air 13-inch, Intel, Early 2015: 54 Wh
- MacBook Air 13-inch, Intel, 2017: 54 Wh
- MacBook Air 13-inch, Intel, Retina, 2018: 50.3 Wh
- MacBook Air 13-inch, Intel, Retina, 2019: 49.9 Wh
- MacBook Air 13-inch, Intel, Retina, 2020: 49.9 Wh
13-inch MacBook Air (M series)
