Battery for Logitech MM50 Speaker System 3.7 V Li-Ion: Amazon.de: Electronics & Photo
New Battery for Logitech MM50, Pure Fi Anywhere Speaker 1st Li ion Lithium Rechargeable Accumulator Pack Replacement 3000mAh|Digital Batteries| - AliExpress
Amazon.com: Replacement Battery for LOGITECH Pure-Fi Anywhere Speaker 2nd MM50 Part NO LOGITECH NTA2335 : Electronics
Amazon.com: Replacement Battery for LOGITECH Pure-Fi Anywhere Speaker 2nd MM50 Part NO LOGITECH NTA2335 : Electronics
Review: Logitech mm50 Portable Speakers for iPod | iLounge