<P> The lithium - ion battery has a charge capacity of 6.8 ampere - hours and is an auxiliary energy storage system . Power output from the lithium ion battery is 22 kW . Battery charge is recovered from braking energy or the hydrogen fuel cell . </P> <Table> <Tr> <Th_colspan="3"> Euro NCAP test results </Th> </Tr> <Tr> <Td_colspan="3"> VW Tiguan 2.0 diesel (2009) </Td> </Tr> <Tr> <Th> Test </Th> <Th> Points </Th> <Th>% </Th> </Tr> <Tr> <Td> Overall: </Td> <Td_colspan="2"> </Td> </Tr> <Tr> <Td> Adult occupant: </Td> <Td> 31 </Td> <Td> 87% </Td> </Tr> <Tr> <Td> Child occupant: </Td> <Td> 39 </Td> <Td> 79% </Td> </Tr> <Tr> <Td> Pedestrian: </Td> <Td> 17 </Td> <Td> 48% </Td> </Tr> <Tr> <Td> Safety assist: </Td> <Td> 5 </Td> <Td> 71% </Td> </Tr> </Table> <Tr> <Th_colspan="3"> Euro NCAP test results </Th> </Tr> <Tr> <Td_colspan="3"> VW Tiguan 2.0 diesel (2009) </Td> </Tr>

What is the weight of a vw tiguan