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Small rectangular Ni-MH battery pack with wire lead, 33.9 by 20.0 by 10.5 mm, matte finish

Estry

Estry 2.4V 80mAh Ni-MH battery for Williams Sound WIR RX-18 AP11A

SKU CH-8FBS-C17QF

Ni-MH replacement battery delivering 2.4 V and 80 mAh for Williams Sound WIR RX-18 infrared receivers

  • Specifications2.4
  • Battery Pack1 Year
  • Exact-fit replacement for Williams Sound WIR RX-18
  • 4 V 80 mAh Ni-MH delivers 0.19 Wh runtime
  • Compact 33.9 × 20.0 × 10.5 mm form factor
  • Weighs just 34.0 g for lightweight receiver use
  • Certified to ISO 9001, RoHS, CE and UN 38.3

Replacement battery for Williams Sound WIR RX-18

This Estry Ni-MH pack is built to match the original specifications for the WIR RX-18 infrared receiver. It delivers 2.4 volts and 80 milliampere-hours of capacity in a sealed cell weighing 34.0 grams. The pack carries ISO 9001, RoHS, CE, UN 38.3 and MSDS certifications.

Verify model and part number before ordering

Confirm that your receiver is the WIR RX-18 and that the original battery part number is AP11A. The replacement measures 33.9 by 20.0 by 10.5 millimetres, so check the compartment dimensions against these figures. Ensure the connector orientation and polarity match the installed pack.

Direct swap for the original AP11A cell

This unit replaces the factory-fitted AP11A battery without modification. The upgrade is worthwhile when the existing pack no longer holds a full charge or shows reduced runtime in daily use. Built-in protection against overcharge, over-discharge, over-voltage and short circuits helps extend service life.

Highlights

  • Exact-fit replacement for Williams Sound WIR RX-18
  • 4 V 80 mAh Ni-MH delivers 0.19 Wh runtime
  • Compact 33.9 × 20.0 × 10.5 mm form factor
  • Weighs just 34.0 g for lightweight receiver use
  • Certified to ISO 9001, RoHS, CE and UN 38.3

Specifications

BrandNi-MH
Model80mAh
Specifications2.4
Battery Pack1 Year

Questions about this item

Does the pack include the Williams Sound WIR RX-18 receiver or just the replacement cell?

Only the 2.4 V 80 mAh Ni-MH cell is supplied; the infrared receiver itself must be obtained separately.

The listing mentions part number AP11A — is that the only version that fits the WIR RX-18?

Yes, AP11A is the exact part number specified for the WIR RX-18 infrared receiver.

With 0.19 Wh capacity, how long will the receiver run between charges?

Runtime depends on the receiver's current draw; the cell stores 0.19 Wh at 2.4 V.

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