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Rectangular Ni-MH battery pack, light grey plastic casing with two metal contacts, 50.79 by 42.4 by 14.23 mm

Estry

Estry SX2001 3.6V 700mAh standard battery

SKU CH-YMFH-ZFMAF MPN SX2001

Ni-MH 3.6V 700mAh replacement battery compatible with Southwestern Bell cordless phone models including SX2001, SX2980 and SG1801

  • Specifications3.6
  • Battery Pack1 Year
  • Replaces original battery in over 20 Southwestern Bell cordless models
  • Ni‑MH chemistry delivers 3.6 V and 700 mAh for reliable talk time
  • Built‑in protection guards against overcharge, over‑discharge and short circuits
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards
  • Compact 50.79 x 42.4 x 14.23 mm pack weighs 114.3 g

Replacement for Southwestern Bell cordless phones

The Estry SX2001 is a nickel-metal hydride battery pack rated at 3.6V and 700mAh. It matches the original specifications for a long list of Southwestern Bell models including SX2001, SX2980, SG1801, FT8959 and many others. The pack delivers 2.52Wh of energy and is built with overcharge, over-discharge, over-voltage and short-circuit protection. It suits owners who need a direct drop-in replacement for a depleted handset battery.

Thermal and power behaviour in daily use

Ni-MH chemistry runs cool during normal talk and standby cycles, so the handset stays comfortable during long calls. Self-discharge is low enough that a phone left on its cradle remains ready for weeks without a top-up charge. The integrated protection circuit guards against over-voltage and short-circuit events that could otherwise shorten cell life. No active cooling or special charging routine is required beyond the standard base station.

Fit and compatibility notes

The pack measures 50.79 x 42.4 x 14.23mm and weighs 114.3g, matching the original battery cavity in the listed Southwestern Bell handsets. It carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications for quality and transport safety. Buyers who need a different voltage, a higher capacity or a lithium-ion chemistry will not be served by this model. Confirm the exact model number on the old pack before ordering.

Highlights

  • Replaces original battery in over 20 Southwestern Bell cordless models
  • Ni‑MH chemistry delivers 3.6 V and 700 mAh for reliable talk time
  • Built‑in protection guards against overcharge, over‑discharge and short circuits
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards
  • Compact 50.79 x 42.4 x 14.23 mm pack weighs 114.3 g

Specifications

BrandNi-MH
Model700mAh
Specifications3.6
Battery Pack1 Year

Questions about this item

How do I install the Estry SX2001 battery and which step causes the most returns?

Open the handset battery compartment, disconnect the old pack connector, attach the new pack matching the keyed plug orientation, and close the cover; the step most often done wrong is reversing the connector, which prevents charging.

What maintenance or replacement will the Estry SX2001 Ni-MH 700mAh pack need over its life?

Ni-MH chemistry benefits from occasional full discharge-charge cycles to reduce memory effect; plan to replace the pack when talk time drops below roughly half of the original 700mAh capacity, typically after several hundred cycles.

What limit appears first during a long call on the Estry SX2001 3.6V 2.52Wh battery?

The 700mAh capacity sets the talk-time ceiling; under continuous transmit load the pack reaches end-of-discharge voltage first, triggering the handset low-battery alert and ending the call.

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