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Small green cylindrical Ni-MH battery with white label, 46mm long

Estry

Estry MDR-RF885R 1.2V 700mAh Ni-MH standard battery

SKU CH-66V5-8PDM1 MPN MDR-RF885R

Ni-MH replacement battery for Sony wireless headphones, 1.2 V, 700 mAh, 0.84 Wh

  • TypeBatteries
  • Battery Pack1-pack
  • Battery TypeNi-MH
  • Battery Capacity700mAh
  • Battery Voltage1.2
  • Direct replacement for original Sony headphone batteries
  • 700 mAh Ni-MH chemistry delivers reliable runtime
  • Built-in protection guards against overcharge and short circuits
  • Compact 46.05 x 11.3 mm size fits original compartment
  • Certified to ISO 9001, RoHS, CE, UN 38.3 and MSDS standards

Replacement for Sony wireless headphones

This Estry Ni-MH battery replaces the original BP-550 pack used in Sony MDR wireless headphone models including the RF885R, RF850R, RF800R, RF960R, DS4000 and IF series. It supplies 1.2V and 700mAh capacity in a single cell measuring 46.05 x 11.3 x 11.3mm and weighing 36.0g.

Verify model and part number before ordering

Check your headphone label for one of the listed compatible model numbers such as MDR-RF885R, MDR-IF3000 or MDR-DS4000. Also confirm the original battery part number is BP-550, BP-550-2, 1-756-316-21 or 1-756-316-22 to ensure correct fit and connector alignment.

Steady output during long listening sessions

The Ni-MH chemistry delivers a stable 1.2V through extended use without the voltage sag seen in short bursts. Built-in overcharge, over-discharge, over-voltage and short-circuit protection maintains consistent performance over many charge cycles. Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards.

Highlights

  • Direct replacement for original Sony headphone batteries
  • 700 mAh Ni-MH chemistry delivers reliable runtime
  • Built-in protection guards against overcharge and short circuits
  • Compact 46.05 x 11.3 mm size fits original compartment
  • Certified to ISO 9001, RoHS, CE, UN 38.3 and MSDS standards

Specifications

TypeBatteries
Battery Pack1-pack
Battery TypeNi-MH
Battery Capacity700mAh
Battery Voltage1.2

Questions about this item

What comes in the box with the Estry MDR-RF885R battery?

The package contains a single 1.2V 700mAh Ni-MH battery pack measuring 46.05 x 11.3 x 11.3mm and weighing 36.0g. No charger or additional accessories are included.

How do I choose the correct version for my device?

Match your device model or original part number against the compatibility list. Supported models include MDR-RF885R, MDR-IF240R?K, MDR-IF3000, MDR-RF850R?K, MDR-IF540R, MDR-IF540RK, MDR-IF140, MDR-RF800R, MDR-RF960R, MDR-RF885RK and MDR-DS4000. Original part numbers covered are BP-550-2, 1-756-316-22, BP-550 and 1-756-316-21.

What does the 700mAh capacity mean for real-world use?

At 1.2V the cell stores 0.84Wh of energy, delivering 700mA for one hour or proportionally longer at lower current draws typical of wireless headphone or headset operation.

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