Never had a problem with battery or a queue that lasted more than a minute or so (either at Carrefour or Auchan, some of the largest ones in Lille). The manual

Never had a problem with battery or a queue that lasted more than a minute or so (either at Carrefour or Auchan, some of the largest ones in Lille). The manual action doesn't take long because the attendant has little to do, and I don't use the lane where you can pay with cash, but the many others that only take a credit card.