Understanding the Battery Capacity of the 2019 MacBook Pro 13
The 2019 MacBook Pro 13" comes with a battery that has a capacity of 4475 mAh. This is a significant improvement from the previous generation, which had a battery rated at 6330 mAh.
How to Calculate Battery Capacity
The mAh rating of a battery is crucial to understanding its capacity. The calculation to determine the battery's mAh can be done using the formula:
Energy output (Wh) Output voltage (V) × Charge (mAh)
For the 2019 13" MacBook Pro, the output voltage can be found via the System Information tool in macOS. You can access this by clicking the Apple logo on your desktop, selecting "System Information," then navigating to the Power section and checking the "Voltage mV" value. Once you have the voltage, you can calculate the charge.
Example Calculation
A typical calculation might look like this:
Output voltage: 12.96V (or 12960mV) Energy output (Wh): 58Wh (as provided by Apple)The formula then becomes:
Charge (mAh) 58Wh / 12.96V 4.475Ah 4475mAh
How Battery Capacity Affects Notebook Performance
The 2019 MacBook Pro 13" features a 58.2 watt-hour (Wh) battery, which is an improvement over the previous 49.9 Wh battery used in the MacBook Air. When conducted on the Laptop Mag battery test, which involves continuous web surfing at 150 nits of screen brightness, the MacBook Pro outperformed the Air by lasting 10 hours and 39 minutes, compared to the Air's 8 hours and 51 minutes.
It's important to note that the battery capacity isn't the only factor affecting performance. Apple's power management, which is different from Windows, plays a significant role in the overall battery life. This means that even if the battery capacity seems low, it might not reflect the actual usage efficiency.
Battery Capacity in the MacBook Air 13"
For the 2019 MacBook Air 13", the battery capacity is slightly different at 582 mWh. This shows that Apple has optimized the battery usage to balance performance with longevity.
Conclusion
While the battery capacity of the 2019 MacBook Pro 13" is 4475 mAh, it's not the only factor that affects performance. The primary factor to consider is the runtime, which can last up to 10 hours with web surfing using Wi-Fi. Understanding these nuances is crucial for users looking to make the most out of their MacBook.