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Rectangular Ni-MH battery pack, green shrink wrap, two wire leads, 57.1 by 52.74 by 15.16 mm

Estry

Estry WTK5504 4.8V 2000mAh standard battery

SKU CH-S66S-A9HPG MPN WTK5504

Replacement 4.8 V 2000 mAh Ni-MH pack for DSC WTK5504 keypad and WS4920HE repeater, 9.6 Wh with overcharge and short-circuit protection

  • Battery pack size1 Year
  • Details4.8
  • Exact-fit replacement for WTK5504, WS4920HE and security alarm panels
  • 8 V Ni-MH chemistry delivers 2000 mAh capacity for long standby time
  • Built-in overcharge, over-discharge, over-voltage and short-circuit protection
  • Certified to ISO 9001, RoHS, CE, UN 38.3 and MSDS standards
  • Compact 57.1 x 52.74 x 15.16 mm pack weighs 141.6 g

Direct replacement for DSC security devices

The Estry WTK5504 is a nickel-metal hydride battery pack built to match the original specifications for the WTK5504 wireless keypad, WS4920HE wireless repeater and compatible security alarm panels. It replaces part numbers 17000153, 4PH-H-AA2100-S-D22 and DSC-BATT2148V. The pack delivers 4.8V and 2000mAh capacity in a 57.1 x 52.74 x 15.16mm form factor weighing 141.6g.

Certified safety with low self-discharge

The battery carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications confirming toxic-free materials and quality assurance. Integrated protection guards against overcharge, over-discharge, over-voltage and short-circuit conditions during normal standby operation. Ni-MH chemistry provides stable voltage output with minimal maintenance for always-on security equipment.

Consistent capacity through extended alarm cycles

Under sustained load such as prolonged alarm signalling or repeater traffic the 9.6Wh pack maintains rated voltage without the sharp drop-off seen in short-burst tests. Protection circuits prevent deep discharge during multi-day power outages while the certified construction resists thermal stress from continuous current draw.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $16.99
Pricier than about 72% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name2,000 mAh
In the box
Battery pack size1 Year

Questions about this item

How do I install the Estry WTK5504 battery in my WTK5504 wireless keypad, and what step is often missed?

Open the keypad housing, disconnect the old pack, and connect the new 4.8V 2000mAh Ni-MH pack matching the original 17000153 part number; the step often missed is verifying the connector polarity before closing the case.

What maintenance or replacement will this 4.8V 2000mAh Ni-MH pack need later?

The pack carries a 1-year warranty; plan to replace it when the keypad shows low-battery alerts or after roughly one year of service, whichever comes first.

What limit appears first when the WTK5504 keypad runs on this battery during sustained use?

The 9.6Wh capacity sets the runtime ceiling; under continuous keypad activity the 2000mAh cells will deplete before any thermal or voltage protection triggers.

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