How the battery score is calculated
Expected battery life from specifications: battery capacity (60%, required), battery capacity per inch of screen (20%), chip manufacturing process (10%), ltpo variable refresh display (10%).
Estimated from specifications, not from a battery rundown test. Real endurance also depends on software tuning.
| Input | Weight | Required | Scale: value → points |
|---|---|---|---|
| Battery capacity | 60% | yes | 4,000 mAh → 0 · 5,000 mAh → 40 · 6,000 mAh → 65 · 7,000 mAh → 85 · 8,000 mAh → 100 |
| Battery capacity per inch of screen | 20% | no | 600 mAh/inch → 0 · 750 mAh/inch → 40 · 900 mAh/inch → 70 · 1,050 mAh/inch → 90 · 1,200 mAh/inch → 100 |
| Chip manufacturing process (smaller is more efficient) | 10% | no | 3 nm → 100 · 4 nm → 75 · 5 nm → 55 · 6 nm → 35 · 12 nm → 0 |
| LTPO variable refresh display | 10% | no | yes = 100, no = 0 |
Worked example
The Redmi Note 17 Pro Max is #3 in the current battery list. Its battery score of 100 comes from these inputs:
| Input | This phone | Points | Weight | Contribution |
|---|---|---|---|---|
| Battery capacity | 10,000 mAh battery | 100 | 60% | 75.0 |
| Battery capacity per inch of screen | worked out from other specifications | 100 | 20% | 25.0 |
| Chip manufacturing process (smaller is more efficient) | not confirmed | — | 10% | left out |
| LTPO variable refresh display | not confirmed | — | 10% | left out |
The contributions add up to the score. An input that is not confirmed is left out and the remaining weights are scaled up to 100%, except where the category counts an unknown input at the middle of its scale (shown as "counts as 50").