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Lectron Pro Upgrade Transmitter Battery Pack - 11.1V 2600mah for Futaba, Hitec, Airtronics, JR, & Spektrum DX7 - Walmart.com
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Amazon.com: Spektrum 2000 mAh 7.4V 2S Li-Ion RC Radio Transmitter Battery Pack: Fits DX9, DX8, DX7S, DX6R, DX5R, and DX5 Pro : Toys & Games
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Amazon.com: GA-B1043 2S LiPo Transmitter Battery (7.4V/4000mAh) (DX7, DX7S, DX8 & DX9) GAB1043 : Toys & Games
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Amazon.com: Gens ace 4000mAh 7.4V 2S TX LiPo Battery Pack with JST-EHR Plug for Spektrum DX9 DX8 DX7S DX7 Transmitter : Toys & Games
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