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Amazon.com: URGENEX 7.4V Lipo Battery 2S 35C 1800mAh Rechargeable RC Battery Pack with Deans T Plug Campatibal with Most 1/10, 1/16 Scale RC Cars Trucks and 7.4V 1to2 USB Lipo Battery Charger :
Radiomaster 2S 7.4V LiPo Transmitter Battery for Boxer/TX16S - 6200mAh
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Gens ace Bashing Series 5200mAh 7.4V 2S1P 35C battery with Deans Plug