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REVIEW

iPhone 18 Pro Max Wireless Charging: 18W, 32W and Cooled 35W

Full 0-100% tests at 25C compare two official MagSafe chargers with a semiconductor-cooled 25W pad: 2h34m versus 1h39m and 97 minutes.

Sep 26, 2026 · Dangel Technology editorial

A full 0-100% wireless charging test on the China-market iPhone 18 Pro Max compared two official MagSafe chargers against a third-party 25W semiconductor-cooled pad. All runs took place in a 25C chamber with a POWER-Z KM003C recorder. The phone's official wireless rating is 15W, and it supports the Qi standard plus the magnetic AVS protocol.

The China-market MagSafe unit (A2140) drew 8.99V at 2.03A, or 18.26W, holding a 9V input and roughly 18W for the first 45 minutes. It reached 20% in 21 minutes, 50% in 53 minutes and 80% in 1 hour 29 minutes, with a full charge taking about 2 hours 34 minutes.

The Hong Kong-market MagSafe unit (A2580) negotiated a 15V input and peaked at 32.5W. It charged to 20% in 10 minutes, 50% in 30 minutes and 80% in 54 minutes, completing the full charge in 1 hour 39 minutes.

The 25W cooled pad (CH-841) pulled 14.98V at 2.36A at the input, peaking at 35.3W against its nominal 25W wireless output. Its semiconductor cooling held about 35W for the first 47 minutes, reaching 50% in 33 minutes and 90% in 72 minutes, with a full charge in 97 minutes.

The results show that wireless charging speed depends less on the nominal 15W rating than on the negotiated input voltage and thermal headroom. Higher-voltage handshakes roughly halved full-charge time, while active cooling kept the third-party pad near its peak far longer than passive designs.

Industry news compiled by Dangel Technology editorial from public reporting by Chongdiantou (charging industry media). Technical figures are reproduced as reported; verify specifications against the original source before design or procurement decisions.