Logitech MM50 speaker system: removing IR sensor. This sensor is always "on", draining the battery in less than a week. I lost the remote, so I have no need for the sensor.
UK Battery for Logitech MM50 Pure-Fi Anywhere Speaker 1st NTA2479 3.7V RoHS | eBay
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Logitech mm50 iPod speaker dock | David Cooper | Flickr