Hints and tips:
...Energy density of conventional batteries has risen about 4 per cent a year over the past two decades to about 700 watt-hour a litre (Wh/L), which translates to a driving range of about 500km in a passenger...
...It’s an account of semi-fame in the 1980s when Thorn and her partner Ben Watt were propelled into the charts with their restrained, smart songs almost despite themselves....
International Edition