The iPhone 17 Pro Max recently earned the crown for the best battery life of any smartphone, beating out 34 competitors in CNET’s testing. But according to new leaks, Apple is not stopping there.
The upcoming iPhone 18 Pro Max is rumored to feature an even larger battery, potentially extending its lead as the battery king when it debuts this fall.
The New Battery Numbers
According to a new post from the prolific Weibo leaker Digital Chat Station, the iPhone 18 Pro Max will see capacity increases across the board. The exact size depends on whether the model supports a physical SIM card or is eSIM-only.
Here is how the new numbers compare to the current champion:
iPhone 17 Pro Max (Current)
- Physical SIM Model: 4,823 mAh
- eSIM-only Model: 5,088 mAh
iPhone 18 Pro Max (Rumored)
- Physical SIM Model: ~5,000 mAh
- eSIM-only Model: ~5,200 mAh
More Than Just Size: The A20 Pro Chip
While the physical battery is getting bigger, efficiency is the real story. The iPhone 18 lineup will reportedly benefit from the new A20 Pro chip.
Built on a cutting-edge 2nm process, this chip is expected to be more power-efficient than ever before. This means the phone can do more work with less energy, stretching that 5,200 mAh capacity even further.
The C2 Modem Boost
In addition to the processor, the rumored Apple C2 modem is expected to bring significant battery boosts. This follows the trend set by the C1 and C1X modems found in the iPhone 16e and iPhone Air, respectively, which improved connectivity efficiency.
Conclusion
Battery life remains one of the most critical features for users, and Apple seems determined to give the people what they want. With a larger cell and smarter silicon, the iPhone 18 Pro Max is shaping up to be a marathon runner.
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