“Will these batteries work with Panasonic cordless phone model KX-TGA470/KX-TG4733B/KX-TG4731? The base says the power source is 5.5V 500 mA and currently uses 550 mAh HHR-55AAABU batteries.”

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• Hello! We recommend using only rechargeable Ni-MH batteries AAA (R03) size. The HHR-4DPA batteries are compatible with KX-TGA470/KX-TG4733B/KX-TG4731. Hope this helps! -C

  Answered by Panasonic Team 11 months ago

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