AA battery vs Bank card: size comparison
AA battery: 5.05 cm. Bank card: 8.56 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×1.7
AA battery
5.05 cm
What is measured Height of an AA battery (LR6)
The AA format has been standardised since 1947.
Source : Wikipedia — AA battery
Bank card
8.56 cm
What is measured Width of an ISO/IEC 7810 ID-1 card
Every bank card in the world is 85.60 × 53.98 mm.
Source : Wikipedia — IEC 7810