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AKZYTUE 3.7V 4000mAh 6050100 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST Connector
High Power Polymer Li-Ion Cell: 3.7V 4000 mAh (6050140-10C) 14.8Wh, 40A rate - UL Listed / UN38.3 Passed (NDGR)