Our old Xbox 360 was dead on all the batteries and the kids had all lost their old battery covers. It was a perfect find - $13 for 10 covers. I only needed four, but for some reason the best price I've ever bought was buying 10 packs. I've had no issues with a cap - AA batteries will fit, as will OEM caps - nothing special about it. either OEM or these fakes. This is a pure use purchase. The covers fit the controllers perfectly: no loose, rattling, or (even worse) questionable power connections! Good price!