Advertisements I think that's an unfair statement. I've had the 659 for 2-1/2 years now, and the quickest I've EVER needed batteries is 8-10 weeks. And, once I set my backlight to a shorter interval, that increased. And, it increased again, when Harmony/Logitech updated the firmware. Right now, I go through a set of batteries every three months at the EARLIEST.