iPhone Battery Capacity Comparison: From Original iPhone to iPhone 17
When Apple launched the first iPhone in 2007, it came with a 1400mAh battery, which was impressive for its time. Over the years, Apple has steadily improved battery technology to balance performance, slim design, and long-lasting usage. Below is a quick look at how iPhone battery capacities have evolved across generations.
iPhone (2007): 1400mAh
iPhone 3G: 1150mAh
iPhone 4: 1420mAh
iPhone 5: 1440mAh
iPhone 6: 1810mAh
iPhone 7: 1960mAh
iPhone 8: 1821mAh
iPhone X: 2716mAh
iPhone 11: 3110mAh
iPhone 12: 2815mAh
iPhone 13: 3240mAh
iPhone 14: 3279mAh
iPhone 15: 3349mAh
iPhone 16: 3561mAh
iPhone 17: 3692mAh
Evolution of iPhone Batteries
The journey of iPhone batteries shows a clear trend: as features expanded, so did battery needs. The iPhone 3G actually had a smaller 1150mAh battery than the original, but improvements in efficiency kept it running. By the time the iPhone 6 arrived, Apple pushed capacity above 1800mAh, while the iPhone 7 broke past 1900mAh.
The biggest leap came with the iPhone X in 2017, jumping to 2716mAh to power its OLED display and Face ID system. From there, Apple focused on striking a balance between size and endurance. The iPhone 11’s 3110mAh was among the most reliable, while the iPhone 13, 14, and 15 kept gradually increasing.
Now, with the iPhone 16 at 3561mAh and iPhone 17 reaching 3692mAh, Apple has provided even more power to support advanced cameras, brighter displays, and 5G connectivity.
Final Thoughts
Battery life is not just about capacity; Apple’s optimization of iOS and chip efficiency plays a huge role. Still, looking at the numbers shows how far iPhones have come—from 1400mAh in 2007 to nearly 3700mAh in 2025.
