アンペア4：バッテリー充電テストと診断

Why this icon holds up

On 2026-08-11 the vault captured the アンペア4：バッテリー充電テストと診断 icon (Utilities, US): 深蓝色背景，中间是一个由绿色渐变组成的字母A，A的内部包含一个闪电符号，顶部有电池轮廓。

No earlier vault capture exists yet, so this dated page is the baseline for future diffs.

Tagged as photographic · calm.

Small-size readability

• Contrast: green mark on blue fill — check both dim OLED and bright LCD.
• Silhouette budget: battery, lightning bolt, letter A should remain readable after the store’s rounded-square crop.
• detailed/illustration/photo detail collapses quickly below ~60px — verify the 60px mental model before trusting the master.
• Internal usability score for this capture: 0.6/100 (heuristic, not a store ranking).

These checks are practical references for designers reviewing アンペア4：バッテリー充電テストと診断, not authoritative store scores.

Transferable design moves

• Keep battery as the primary silhouette before adding secondary ornaments.
• Concentrate the loudest chroma on the identifying shape (green), not the whole blue field.
• This capture’s detailed/illustration/photo vocabulary transfers best when the same restraint is applied at export size.