Apple iPhone 15 battery

(4 reviews)

Your iPhone 15 no longer lasts the day? A new 3349 mAh battery restores its original runtime, easy to fit yourself at a low price.

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Characteristics

  • Compatibility: Apple iPhone 15
  • Capacity: 3349 mAh
  • Type: Lithium-ion (replacement)
  • Supplied with: New battery + tools
  • Restores the iPhone 15's original runtime

Detailed overview: iPhone 15 replacement battery 3349 mAh

This replacement battery for iPhone 15 is the ideal solution when your smartphone no longer lasts the day. Over time and charge cycles, the original battery degrades: runtime drops, the iPhone may shut down abruptly even with charge left, and the battery health indicator (in Settings > Battery) falls below 80%. Replacing the battery restores the phone's original endurance.

With a 3349 mAh capacity, identical to the iPhone 15's factory battery, this new part restores a full day of runtime. It is supplied new, usually with the necessary removal tools (spudgers, screwdriver, adhesive), letting you do the swap yourself following a tutorial, or entrust it to a repairer.

Replacing the battery rather than changing phones is both affordable, for a few tens of pounds instead of a new device, and eco-friendly, extending the device's life and reducing electronic waste. The job requires some care (the iPhone 15 is glued and has fragile ribbon cables), but stays doable with the right tools and a little method. At end of life, the old battery recycles in the bins provided.

We also cover the earlier generations: iPhone 11 battery kit, iPhone 12 battery kit, iPhone 13 battery kit and iPhone 14 battery kit, as well as the next one: iPhone 16 battery.

Frequently asked questions: iPhone 15 replacement battery 3349 mAh

The marker is still 80 % maximum capacity, in Settings > Battery > Battery Health. The iPhone 15 adds something the 11 to 14 generations do not show: the charge cycle count, in Settings > General > About. Two indicators beat one when deciding without guesswork.

Slightly: 3349 mAh against 3279 mAh, about 2 % more. The step up is more modest than the jump from the 12 to the 13, and most of this generation's runtime gain comes from processor efficiency rather than from the energy reserve.

Yes, and it is an option the iPhone 15 offers where earlier models do not. Avoiding the last few percent reduces the time spent at high voltage, one of the ageing factors for lithium cells. The trade-off is plain: less runtime available each day, but a capacity that declines more slowly.

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Published on 12/07/2026, updated on 14/08/2026