High quality OEM replacement switches from FrSky that includes the NiMH 2000 mAh charge circuit. This unit can be used to upgrade early "A" model Taranis radios to have the "B" model Taranis charge circuit that supports longer charge times when used with the upgraded 2000mAh battery. (A model radios will charge with a steady green LED, but this newer charge circuit will charge with a flashing green LED, and it goes steady when battery is fully charged.)