ルマフィールドバッテリー品質レポート
Every year, Apple ships hundreds of millions of iPhones across more than 60 countries, each one dependent on a battery that performs exactly as specified. As third-party repair ecosystems grow and the refurbished device market expands, the question of what is actually inside a replacement battery becomes more consequential.
We CT scanned genuine Apple batteries, used batteries pulled from phones, and third-party replacements to examine the differences.
20
iPhone 16 batteries CT scanned across 4 source populations.
2x
higher anode overhang in third-party batteries compared to genuine Apple cells.
3x
worse edge alignment in the third-party replacement cells, versus OEM.
1054 件中 33 件
global mobile battery replacement services market in 2024.
247M
iPhones shipped worldwide in 2025.
13 件中 1 件
global used and refurbished smartphone market in 2024.
Every lithium-ion battery degrades, and in no device is the gradual performance hit more apparent than in a mobile phone. Repairs and refurbishment allow users to extend the lifespan of their devices, but the internal quality of the battery replacement being installed is generally invisible.
Lumafield scanned 20 iPhone 16 batteries across four source populations: new genuine Apple batteries, grade B and grade C used cells pulled from returned phones, and new third-party replacements. The goal was to find out whether the differences that matter to battery performance and safety are visible before a phone fails.
Our automated analysis focused on anode/cathode overhang and electrode edge alignment, two internal geometry parameters that directly govern cell performance and safety margin and are invisible to other inspection methods.
私たちが見つけたのは憂慮すべきことでした:
Apple precision prevails
18650はすべて同じ18 mm x 65 mmの缶を使用していますが、安全性はゼリーロールにあります。CTでは、アノードのオーバーハングとエッジのアライメント、つまりリチウムメッキとショートを支配する形状を確認できます。
Genuine used holds up
売り手は信頼できるモデル名を真似してラップし、スペックを膨らませます。当社では、Samsungの30Qブランドを模倣し、9900mAhというクレームを、通常約3000mAhのフォーマットでコピーした出品情報を文書化しました。
Third-party lags behind
低コストのロットでは、スプレッドが広く、外れ値が極端でした。あるブランドの中央値が許容範囲内であるように見えても、多くのセルがアノードオーバーハングの目標値を約0.500 mm下回り、アライメントのばらつきはOEM企業よりもはるかに大きかった。
バッテリー品質レポートの全文をダウンロードして、以下をご確認ください。
- Detailed findings on battery quality across OEM, grade B and C iPhone pulls, and third-party cells
- How automated CT analysis turns internal battery geometry into measurable, traceable quality data
- Insights into the investigation methodology, including Lumafield's cutting-edge CT scanning and automated analysis techniques
- Recommendations for manufacturers and consumers to monitor process quality in the battery supply chain
Learn how industrial X-ray CT can identify and help reduce hidden hazards in the lithium-ion battery supply chain.
