What's the fastest charging speed your iPad or iPhone port can handle?
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You may be able to charge your devices much faster.
Key facts
- The iPhone 17 Pro Max, Apple's largest smartphone, has a battery capacity of 5,088mAh, while the base model iPhone 17 relies on a 3,692mAh cell
- As of the latest iPhone 17 series, the 17, 17 Pro and 17 Pro Max can all charge at up to 40W, while the iPhone Air tops out at 20W, one of the tradeoffs necessary to achieve its thin design
- For example, a 1,000mAh cell can deliver 1,000 milliamps for exactly one hour before dying
- Even so, 5,000mAh is roughly the median for a large smartphone these days, while tablets tend to come closer to 10,000mAh
Summary
Getting the most out of your iPhone or iPad's battery is about more than keeping an eye on how much power your apps consume. Your charging speed can also have an effect on your battery's longevity. But to charge your devices at their maximum speeds, you have to know what those speeds are. As compared to some competitors, Apple is inconsistent about listing battery specifications on its consumer-facing spec sheets, leaving you to figure it out. Let's start with the basics. For example, a 1,000mAh cell can deliver 1,000 milliamps for exactly one hour before dying. The iPhone 17 Pro Max, Apple's largest smartphone, has a battery capacity of 5,088mAh, while the base model iPhone 17 relies on a 3,692mAh cell. Charging speeds are measured in watts. Even so, with improved charging technologies such as USB Power Delivery (USB-PD), it is increasingly possible to charge even small devices such as smartphones at increasingly high rates.