tech-battery

  Children under the age of six should not be exposed to screens, including   television , to avoid permanent damage to their brain development, French medical experts have said. TV, tablets,  computers , video games and smartphones have “already had a heavy impact on a young generation sacrificed on the altar of ignorance”, according to an open letter to the government from five leading health bodies – the societies of paediatrics, public health, ophthalmology, child and adolescent psychiatry, and health and environment. Calling for an urgent rethink by public policies to protect future generations, they said: “ Screens  in whatever form do not meet children’s needs. Worse, they hinder and alter brain development,” causing “a lasting alteration to their health and their intellectual capacities”. Current recommendations in France are that children should not be exposed to screens before the age of three and have only “ occasional use ” between the ages of three and s...

  New research pushes   aluminium batteries   as the next generation technology to revolutionise mobile devices, but what else could finally make smartphones last more than a day New research by Stanford University into  aluminium batteries  promises to produce cells that are big enough for a smartphone and charge in just 60 seconds. The new high-performance aluminium-ion  battery  is the first using the metal – more commonly found in aircraft and car bodies – to demonstrate long life and fast charging. It does this using a graphite electrode. Previous aluminium batteries have suffered from poor life, failing after 100 recharge cycles. Stanford’s new  battery  can be recharged around 7,500 times. Typical lithium-ion batteries used in everything from smartphones and laptops to electric cars last around 1,000 recharge cycles. But the new aluminium-ion batteries are far from being available for commercial use in electronics, producing just half ...