Create checkbox in javascript

I have a problem, when I create checkbox using javascript, the checkbox cannot be checked or unchecked. My code in javascript is:

function createNewCheckboxt(name, id){
  var box = document.createElement("li");
  box.innerHTML = '<div class="checkbox clip-check check-primary"><input type="checkbox" name="cbrand" id="'+id+'" value="'+name+'" checked=""><label for="data'+ id +'">'+ name +'</label>';   
                        document.getElementById("brand").appendChild(box);
}

<ul class="list_brand_merchant" id="brand">
</ul>