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Writers recall spa trips that made them question their sanity
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France wouldn t be France without strikes, protests and police baton charges
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Letters: Futile policy based not on those ill with Covid, but on tests for the virus
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Tesla vehicles at charging stations outside a store in Rocklin, California, America
Credit: Bloomberg/David Paul Morris
SIR – It is proposed that electric car owners could connect their cars to the National Grid and allow the energy in their batteries to take some of the load at peak times (report, July 28). But such use would seriously compromise battery life.
A typical lithium-ion battery has a life of about 1,000 cycles. For a car like a Tesla S, a 100kWh battery costs about £10,000. So each charge cycle costs £10 – or 10p per kWh – in battery wear and tear alone.
This sum of 10p per kWh is nearly twice the current wholesale price of electricity. Unless car owners are prepared to bear the extra wear on their batteries without compensation (and who would?) the price of electricity would have to increase very significantly.
26/07/2021 00:00
El lunes 19 de julio se celebró en Inglaterra el día de la Libertad. Mascarillas fuera, la espuma de cervezas rebosando en los pubs, desaparición de la distancia social y cuerpos volviendo al camino, la verdad y la vida en discotecas. Se expiraba la alegría del fin de las restricciones. Pero un par de semanas antes 1.200 científicos habían suscrito una carta, publicada en The Lancet , advirtiendo que era un error apostar por el escenario de infección masiva. Ahora implicaría no solo seguir desgastando a los trabajadores de la sanidad. Esta vez los principales afectados iban a ser los segmentos de población aún no vacunada: niños y jóvenes. Y las consecuencias para ellos podían condicionar sus vidas: “Esta estrategia corre el riesgo de crear una generación que sufra problemas de salud crónicos y discapacidad, cuyo impacto personal y económico podría sentirse en las próximas décadas”. Además se estaban posibilitando las condiciones para la ap