The perfect upgrade for the Spektrum NX6, NX8, NX8+, NX10, and iX12 transmitters. Spektrum 3.7V 6600mAh 1S Li-Ion Transmitter Battery: NX6/NX8/NX10/iX12, Tx Plug (XH-1S) : SPMB6600LITX. Midland Helicopters Ltd.
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