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Amazon.com: Synergy Digital Wireless Headset Battery, Works with Sony SBH-20 Wireless Headset, (Li-Pol, 3.7V, 110 mAh) Ultra Hi-Capacity, Compatible with Sony 381424 Battery
Easylander 3.7V 110mAh Replacement li-Polymer Li-ion Battery For SONY SBH20 SBH-20 bluetooth headset - buy at the price of $12.99 in aliexpress.com | imall.com