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Synergy Digital Wireless Headset Battery, Works with Bang & Olufsen BeoPlay H9i Wireless Headset, (Li-Ion, 3.7V, 850 mAh) Ultra Hi-Capacity, Compatible with Bang & Olufsen PLB-103 Battery - Walmart.com
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Li-Ion-battery - 770mAh (3.7V) - for wireless headset, headphones Bang & Olufsen BeoPlay H9i - Electropapa
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