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The mystery behind why Samsung, Apple, and Google don’t significantly increase battery sizes has been solved, with the primary reason being U.S. federal regulations on lithium battery transportation, 49 CFR 173.185: For lithium-ion battery cells, the limit is 20 Wh.

Overview of Battery Capacities for Major Flagship Phones in the U.S. Market

The battery capacities of major flagship phone brands in the U.S. market (Apple, Samsung, Google, Motorola, OnePlus, Sony, etc.) are as follows (converted to Wh for comparison with regulations):

Apple:
iPhone 16 / 16 Pro / 16 Pro Max: Battery capacity approximately 3355–4702mAh, voltage typically 3.8V.
Calculation: Wh = (mAh × V) ÷ 1000
3355mAh × 3.8V ÷ 1000 ≈ 12.75 Wh
4702mAh × 3.8V ÷ 1000 ≈ 17.87 Wh

Samsung:
Galaxy S25 / S25+ / S25 Ultra: 4000–5000mAh, voltage approximately 3.85V.
4000mAh × 3.85V ÷ 1000 ≈ 15.4 Wh
5000mAh × 3.88V ÷ 1000 ≈ 19.4 Wh
Galaxy Z Fold 6 / Z Flip 6: 4000–4400mAh, approximately 15.4–16.94 Wh.

Google:
Pixel 9 / 9 Pro / 9 Pro XL: 4700–5100mAh, voltage approximately 3.85V.
5060mAh × 3.89V ÷ 1000 ≈ 19.68 Wh

Motorola: Razr Ultra:
4700mAh, approximately 18.1 Wh.
Edge 50 Ultra: 4400mAh, approximately 16.94 Wh.

OnePlus: OnePlus 13: 6000mAh, voltage approximately 3.87V, approximately 23.22 Wh, but uses a dual-cell design, with each cell not exceeding 20 Wh.

Sony: Xperia 1 VII: 5000mAh, voltage approximately 3.85V, approximately 19.25 Wh

The mystery behind why Samsung, Apple, and Google don’t significantly increase battery sizes has been solved, with the primary reason being U.S. federal regulations on lithium battery transportation, 49 CFR 173.185: For lithium-ion battery cells, the limit is 20 Wh.

Overview of Battery Capacities for Major Flagship Phones in the U.S. Market

The battery capacities of major flagship phone brands in the U.S. market (Apple, Samsung, Google, Motorola, OnePlus, Sony, etc.) are as follows (converted to Wh for comparison with regulations):

Apple:
iPhone 16 / 16 Pro / 16 Pro Max: Battery capacity approximately 3355–4702mAh, voltage typically 3.8V.
Calculation: Wh = (mAh × V) ÷ 1000
3355mAh × 3.8V ÷ 1000 ≈ 12.75 Wh
4702mAh × 3.8V ÷ 1000 ≈ 17.87 Wh

Samsung:
Galaxy S25 / S25+ / S25 Ultra: 4000–5000mAh, voltage approximately 3.85V.
4000mAh × 3.85V ÷ 1000 ≈ 15.4 Wh
5000mAh × 3.88V ÷ 1000 ≈ 19.4 Wh
Galaxy Z Fold 6 / Z Flip 6: 4000–4400mAh, approximately 15.4–16.94 Wh.

Google:
Pixel 9 / 9 Pro / 9 Pro XL: 4700–5100mAh, voltage approximately 3.85V.
5060mAh × 3.89V ÷ 1000 ≈ 19.68 Wh

Motorola: Razr Ultra:
4700mAh, approximately 18.1 Wh.
Edge 50 Ultra: 4400mAh, approximately 16.94 Wh.

OnePlus: OnePlus 13: 6000mAh, voltage approximately 3.87V, approximately 23.22 Wh, but uses a dual-cell design, with each cell not exceeding 20 Wh.

Sony: Xperia 1 VII: 5000mAh, voltage approximately 3.85V, approximately 19.25 Wh
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