I bought the crossbars from this seller. The battery will get you through about 1/2 - 3/4 day if you use for both calls and to stream audio, about 3-3. I think for the price these sound incredible and genuinely impress me) Ive only been using them a few days, but I am really impressed with pretty much everything about them. Ah, Cyberpunk. Not happy with the sizes as the sizes are smaller than normal. I ordered my usual Docs size and a size down. Also Waterproof. Comfort is average. Im 7 1/8 and they are just about OK.