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Phonak Roger Focus II 312 Zinc Air Battery Wireless Receiver - South Australia Speech and Hearing Centre
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ZPower 312 Rechargeable Hearing Aid Battery - ZPower Battery Silver-Zinc XR41 (2 Batteries - Size 312) - Compatible with Hearing Aids Using ZPower Rechargeable Systems : Amazon.com.au: Electronics
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Non-Rechargeable vs. Rechargeable Hearing Aid Batteries: Size 10, 312, 13, 675 Hearing Aid Batteries
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