iPhone 16 Pro Max Battery Health: One-Year Review

A year-long battery health test on the iPhone 16 Pro Max has concluded. The device was charged exclusively with an 80% limit enabled. After 12 months and 299 charge cycles, the battery’s maximum capacity is 94%.

This real-world experiment provides new data on lithium-ion battery longevity. It offers insights for users concerned about their device’s long-term health.

Comparing Results to Previous iPhone Models

The test aimed to see if an 80% charge limit significantly preserves battery health. The results show a similar outcome to a previous test. An iPhone 15 Pro Max under the same conditions also had 94% capacity after one year.

A colleague’s iPhone 16 Pro Max was used for comparison. That phone was charged normally without any limits. Its battery health is at 96% after 308 cycles, according to the user’s report.

The Impact of Charging Habits and Heat

This year’s test involved a conscious effort to keep the battery above 20%. The user employed a mix of MagSafe wireless charging and USB-C fast charging. Heat generated during wireless charging may have been a factor in battery degradation.

The inconvenience of an 80% limit was noted, especially during heavy use outdoors. Apple’s software occasionally charges the battery to 100% for calibration. These days provided a welcome boost for longer activities.

The findings suggest that for most users, a strict 80% charge limit may offer minimal battery health benefits over a single year. While potentially useful for long-term ownership, everyday charging habits and heat management appear equally important for preserving your iPhone 16 Pro Max battery.

Info at your fingertips

What is a normal battery health percentage after one year?

Most modern smartphones, including iPhones, typically retain around 90-95% of their original capacity after a year of average use. The exact figure depends on individual charging habits and usage patterns.

Should I use the 80% charge limit on my iPhone?

Based on this test, it may not be necessary for most users planning to upgrade within two to three years. The feature is best suited for those who keep their devices for longer periods and want to maximize long-term battery longevity.

Does wireless charging damage the battery faster?

Wireless charging can generate more heat than wired charging. Excessive heat is a key factor in battery degradation. Occasional wireless charging is fine, but consistent high-heat charging may impact health over time.

How many charge cycles can an iPhone battery handle?

Apple designs its batteries to retain up to 80% of their original capacity at 1000 complete charge cycles. A cycle is counted each time you use a amount of charge that equals 100% of your battery’s capacity.

What is the best way to charge an iPhone?

For general use, regular charging with the included or certified cables is recommended. Avoid consistently draining the battery to zero or leaving it at 100% charge for extended periods. Moderate temperatures are also ideal.