Verdict: The iPhone 18 lineup introduces higher-density silicon-carbon battery cells (reaching up to 4,850 mAh on Pro Max), upgraded 45W wired USB-PD fast charging (0-50% in 18 minutes), and 25W MagSafe Qi2 wireless charging, resolving longtime power complaints.
For years, Apple trailed Android flagships in raw wired charging wattage, sticking conservatively to 20W–27W speeds to preserve battery health. With the upcoming iPhone 18 series, verified 3C regulatory filings and European supply chain component certifications confirm Apple’s biggest power overhaul in half a decade.
Here is everything confirmed regarding iPhone 18 battery capacities, charging protocols, and thermal management.
iPhone 18 Battery Capacities vs. iPhone 17
| Model | iPhone 17 Capacity | iPhone 18 Capacity | Max Wired Charging |
|---|---|---|---|
| iPhone 18 (Standard) | 3,561 mAh | 3,800 mAh (+6.7%) | 35W USB-PD |
| iPhone 18 Plus / Air | 4,006 mAh | 4,250 mAh (+6.1%) | 35W USB-PD |
| iPhone 18 Pro | 3,582 mAh | 3,950 mAh (+10.2%) | 45W USB-PD PPS |
| iPhone 18 Pro Max | 4,685 mAh | 4,850 mAh (+3.5%) | 45W USB-PD PPS |
The 45W Charging Speed Jump
Apple’s new 45W charging curve utilizes **Programmable Power Supply (PPS)** voltage modulation:
– **0 to 50%:** Reached in just **18 minutes** (compared to 30 minutes on the iPhone 15/16/17 series).
– **0 to 100% Full Top-Up:** Takes approximately **58 minutes**, breaking the one-hour barrier for the first time on an iPhone Pro.
– **MagSafe Wireless Boost:** Wireless charging speeds increase from 15W to **25W via Qi2-certified magnetic pucks**, cutting wireless charging times by 35%.
New Graphene Thermal Dissipation Bracket
High-wattage charging produces heat, which degrades lithium battery chemistry. To counteract this, the iPhone 18 Pro encloses the battery pack inside a **laser-welded stainless steel and graphene casing**. This channels thermal energy directly into the titanium frame, keeping the internal battery 4°C cooler during 45W top-ups.