As one of its daily deals, A4C offers the Böhm B66 Wireless Bluetooth On-Ear Headphones in Black for $39 with free shipping. That's tied with last week's mention as the best deal we've seen for a new pair. (This is usually around the price for a refurbished unit; it's the lowest price for a new set now by $21.) These closed-back headphones feature Bluetooth 4.0, active noise canceling, and an 18-hour rechargeable battery. Deal ends today.
You very likely are putting your laptop battery into an early grave.