<P> In 2007, D batteries accounted for 8% of alkaline primary battery sales (numerically) in the US . In 2008, Swiss purchases of D batteries amounted to 3.4% of primary and 1.4% of secondary sales . </P> <Table> <Tr> <Th> </Th> <Th> Zinc--carbon </Th> <Th> Alkaline </Th> <Th> Li - FeS </Th> <Th> NiCd </Th> <Th> NiMH </Th> </Tr> <Tr> <Td> IEC name </Td> <Td> R20 </Td> <Td> LR20 </Td> <Td> FR20 </Td> <Td> KR20 </Td> <Td> HR20 </Td> </Tr> <Tr> <Td> Alternative name </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> B006 </Td> </Tr> <Tr> <Td> ANSI / NEDA name </Td> <Td> 13D </Td> <Td> 13A </Td> <Td> 13LF </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Typical capacity </Td> <Td> 8000 mAh <P> (12 Wh) </P> </Td> <Td> 12000 - 18000 mAh <P> (18 - 27 Wh) </P> </Td> <Td> </Td> <Td> 2000 - 5500 mAh <P> (2.5 - 6.9 Wh) </P> </Td> <Td> 2200--12000 mAh <P> (2.75 - 15 Wh) </P> </Td> </Tr> <Tr> <Td> Nominal voltage </Td> <Td> 1.5 V </Td> <Td> 1.5 V </Td> <Td> 1.5 V </Td> <Td> 1.25 V </Td> <Td> 1.25 V </Td> </Tr> <Tr> <Td> Rechargeable </Td> <Td> No </Td> <Td> Special type only </Td> <Td> No </Td> <Td> Yes </Td> <Td> Yes </Td> </Tr> </Table> <Tr> <Th> </Th> <Th> Zinc--carbon </Th> <Th> Alkaline </Th> <Th> Li - FeS </Th> <Th> NiCd </Th> <Th> NiMH </Th> </Tr> <Tr> <Td> IEC name </Td> <Td> R20 </Td> <Td> LR20 </Td> <Td> FR20 </Td> <Td> KR20 </Td> <Td> HR20 </Td> </Tr>

How many amp hours in a d cell battery