The second one does, here's a quote:

More basic items come directly from suppliers to skip the design and conception stage. However, it isn’t as easy as picking out items from a catalog. IKEA works with their world-class buyers to check the quality of the products and negotiate the price.

...

This means that they have to keep their shelves stocked with products to keep up with demand, so using both manufacturers and supplies ensures that new products will consistently make a turnaround.

I would assume a USB charger would fall under the "more basic items" part.

I take this to mean that instead of designing a product to be manufactured elsewhere, they sometimes buy products to relabel and put on the shelves, without going through any form of design process (though I'm guessing they do test this stuff).