A:AnswerThe KX-TGA939T is a 2 line expansion handset, it is not a compatible handset. The only compatible handset models are the: KX-TGA931T, and the KX-TGA935B. Thank you for your question Al.
A:AnswerThe handset model, KX-TGA939T uses rechargeable Ni- MH batteries AAA (R03) size. The part number for the Panasonic battery is HHR-4DPA and it is available here.
A:AnswerHi, You can have a a different model on the same line, plugged on the same line. But if you mean "expansion phone" as extended handset, each base unit has it's own compatible handset. These are the handset that you need to register to the base as extra handset.
A:AnswerIt is not possible to give the range in actual distance since the range is relative to where you are to place the base unit. It is recommended to have it placed at a convenient, high, and central location with no obstructions between the handset and base unit in an indoor environment. The frequency the phone works on is 1.9Ghz and it is supposed to provide the longest range compared to other frequencies out on the market right now.