D*H*Tmm

Surface area (m²/m³)

Free volume (%)

Number per m³

Bulk density (kg/m³)

F Factor m-1）

16*8.9*1.0

370

85

299136

135.6

602.5

25*17.5*1.0

228

90

74000

65.2

312.8

38*19*1.2

132.5

91

18650

54.5

175.8

50*25*1.5

114.2

92.7

9200

49.2

143.1

76*38*2.6

90

92.9

3980

63.5

112.3

100*50*3.0

76

94.1

1800

45

101.1