const arr = [{"id":"Lenovo-21910310001","name":"Batrei ","price":"","amount":"1","cut":"","disc":"","pay":"0"},{"id":"Lenovo-21910310001","name":"Batrei ","price":"","amount":"3","cut":"","disc":"","pay":"0"},{"id":"Samsung-21910310002","name":"Chip Power Ac Dan Dc ","price":"600","amount":"5","cut":"","disc":"","pay":"600"}]

const filteredArr = arr.reduce((acc, current) => {
  let index;
  const x = acc.find((item,i) => {
      index = i;
      return (item.id === current.id)
  });

  if (!x) {
    console.log(current)
    return acc.concat([current]);
  } else {
	acc[index] = current
    return acc;
  }
}, []);

console.log(filteredArr)