Klipsch Mode Headphones Cancel Noise For 45 Hours

If your have noise cancelling headphones, you know that the batteries typically don't last long.  No batteries, no active noise cancelling.  The Klipsch Mode Cans, expected to go on sale this Fall, will cancel noise for 45 hours before the batteries run out.  That is super long.  Will update with a full review when we get out hands on them.