1.2 V

1.5 V

1.8 V

2.0 V

40%

50%

60%

70%

cylindrical cell and rectangular cell

dry cell and wet cell

primary cell and secondary cell

acid cell and alkali cell

series

parallel

series parallel

star

1.2 V per cell

1.5 V per cell

1.7 V per cell

2.0 V per cell