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Small rectangular Ni-MH battery pack with wire connector, 46.3 by 23.1 by 12.0mm, green shrink wrap

Estry

Estry MDR-RF970RK Standard Battery 2.4V 700mAh

SKU CH-5T75-DFA28 MPN MDR-RF970RK

Ni-MH replacement battery delivering 2.4 V and 700 mAh for compatible Sony headphone models

  • Specifications2.4
  • Battery Pack1 Year
  • Compatible with 11 Sony headphone models
  • 4V 700mAh Ni-MH chemistry delivers 1.68Wh
  • Built-in protection against overcharge and short circuit
  • Certified to ISO9001 RoHS CE UN38.3 MSDS
  • Compact 46.3 x 23.1 x 12.0mm at 51.0g

Replacement battery for Sony MDR-RF headphones

The Estry MDR-RF970RK is a nickel-metal-hydride pack built to match the original 2.4 V 700 mAh specification. It fits fourteen headphone models ranging from the MDR-RF810 to the MDR-RF4000K and replaces the BP-550-11 part number. Buyers who need a different voltage or a lithium chemistry will not find it here.

700 mAh capacity with integrated protection

The cell delivers 1.68 Wh of energy and includes over-charge, over-discharge, over-voltage and short-circuit safeguards. Runtime matches the factory pack for typical listening sessions, though heavy users may notice the limit sooner than with higher-capacity alternatives.

Compact Ni-MH pack with safety certifications

Measuring 46.3 by 23.1 by 12.0 mm and weighing 51.0 g, the battery slots into the headphone compartment without modification. It carries ISO 9001, RoHS, CE, UN 38.3 and MSDS approvals, confirming compliance for transport and daily use.

Highlights

  • Compatible with 11 Sony headphone models
  • 4V 700mAh Ni-MH chemistry delivers 1.68Wh
  • Built-in protection against overcharge and short circuit
  • Certified to ISO9001 RoHS CE UN38.3 MSDS
  • Compact 46.3 x 23.1 x 12.0mm at 51.0g

Specifications

BrandNi-MH
Model700mAh
Specifications2.4
Battery Pack1 Year

Questions about this item

Will the 2.4 V 700 mAh Ni-MH pack fit my MDR-RF925 headphones?

Yes, the replacement is listed as compatible with the MDR-RF925 among other models.

How can I verify the battery is performing correctly after installation?

The headphones should power on and hold a charge for normal listening sessions.

Does the package include a charger or only the BP-550-11 cell?

Only the 46.3 × 23.1 × 12.0 mm, 51.0 g battery pack is supplied; a charger must be sourced separately.

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