But, before you get too down, you should know that Sennheiser is altering more than just the design of this generation. In June, the business stated that when they come in August, they would have almost four times the battery life at 60 hours on a charge (up from 16). They may also be less costly, with a recommended retail price of 449.95 Canadian dollars (approximately $350 USD). For reference, the third-generation model initially cost $530 CAD / $400 USD.