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Rectangular Ni-MH battery pack 51.5 by 45.2 by 10.9 mm, 6.0 V 700 mAh

Estry

Estry 55111-05 6.0V 700mAh standard battery

SKU CH-CZZA-D0SS4 MPN 55111-05

Ni-MH 6.0V 700mAh replacement pack for 55111-05 and 5800RP wireless repeaters, 4.2Wh with protection circuits

  • Specifications6
  • Battery Pack1 Year
  • Direct replacement for original 55111-05 battery
  • 0V 700mAh Ni-MH delivers 4.2Wh reliable power
  • Fits 5800RP Wireless and K0257 repeater models
  • Built-in overcharge, over-discharge and short-circuit protection
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards

Direct replacement battery

The Estry 55111-05 is a 6.0V 700mAh nickel-metal hydride pack built to match the original specifications for the 5800RP Wireless Repeater and K0257 devices. It delivers 4.2Wh of energy in a compact 51.5 x 45.2 x 10.9mm form factor weighing 85.0g. The pack includes overcharge, over-discharge, over-voltage and short-circuit protection for safe operation. Certifications include ISO9001, RoHS, CE, UN38.3 and MSDS.

Upgrades worn original cells

This pack replaces the factory-fitted battery when runtime has dropped or the repeater no longer holds a charge through its duty cycle. The jump is worth it when the existing cell shows reduced capacity, swelling or failure to power the 5800RP Wireless Repeater reliably. Matching the original voltage and 700mAh rating restores the intended operating time without modification. Confirm the part number 55111-05 or K0257 before ordering to ensure correct fit.

Suits repeater owners needing a certified spare

The battery suits technicians and installers maintaining 5800RP Wireless Repeater units who require a RoHS-compliant, CE-marked replacement with documented safety testing. It is not for buyers who need a different voltage, a higher capacity than 700mAh, or a chemistry other than nickel-metal hydride. The fixed 6.0V output and specific dimensions also rule out use in devices expecting other form factors or electrical parameters.

Highlights

  • Direct replacement for original 55111-05 battery
  • 0V 700mAh Ni-MH delivers 4.2Wh reliable power
  • Fits 5800RP Wireless and K0257 repeater models
  • Built-in overcharge, over-discharge and short-circuit protection
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards

Specifications

BrandNi-MH
Model700mAh
Specifications6
Battery Pack1 Year

Questions about this item

What are the dimensions of the 55111-05 battery pack for the 5800RP Wireless Repeater?

The pack measures 51.5 x 45.2 x 10.9 mm and weighs 85.0 g, matching the original housing for the 55111-05 and K0257 models.

How is the battery installed and what step is commonly missed?

Open the repeater's battery compartment, disconnect the old pack, connect the new 6.0 V 700 mAh pack observing the correct polarity, then secure the cover; the step often missed is verifying the connector orientation before pressing it in.

When should the 700 mAh Ni-MH pack be replaced?

Replace the pack when the repeater's backup run-time falls to roughly half of its original duration, which typically occurs after about one year of regular charge cycles.

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