Sunday Times Driving: A German companis testing a saltwater-based flow battery called the NanoFlowcell which is said to have five times the energy density of a lithium-ion battery. It also has no 'memory effect', meaning that its performance does not deteriorate over its operating life.
The Quant e-Sportslimosine car in which the battery is being tested was approved for testing on European roads by Germany's SGS-TUV Saar transport safety organisation.
The electric car is capable of 200mph+, with a 0-62mph in 2.8 seconds and a range of 370 miles.
