If youre in the market to upgrade to the 30k there is absolutely no reason to do so. My 2 boys also have the blue kids ones that light up. 000 mAh y no 5. I just needed them to tighten. The price isnt bad, but I would have liked to find something a little less. They fit well as I have a wide foot and the last pair my feet would sweat and then the slippers would stink. First impression of audio was poor. 5-stars for overall performance. I bought these Because I figured if he gets to one of these, at least I?ve got back ups! I originally bought this for a second PC but I ended up liking it so much I replaced my Corsair K70 as the keyboard for my main PC.