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Rectangular lithium-ion battery pack, dark finish, gold contacts, 39.65 by 37.96 by 6.62 millimetres

Estry

Estry MDR-1RBT 800mAh 3.7V standard battery

SKU CH-YTM9-CR3RH MPN MDR-1RBT

Replacement lithium-ion cell for Sony MDR-1RBT headphones, 800mAh at 3.7V with built-in protection circuits

  • TypeRechargeable Batteries
  • Battery Capacity800mAh
  • Battery Voltage3.7
  • Replaces Sony MDR-1RBT headset battery directly
  • 800mAh capacity restores original play time
  • 7V Li-ion matches factory voltage exactly
  • 65 x 37.96 x 6.62mm fits battery bay precisely
  • CE, RoHS, ISO9001, UN38.3 certified for safety

Replacement Li-ion battery for Sony headphones

This 800mAh 3.7V lithium-ion cell replaces the original SP70, SP70A, NP-SP70, SP70B and 4-261-368-01 packs used in the Sony MDR-1RBT headphones. It matches the factory voltage, capacity and 2.96Wh rating exactly. Built-in protection guards against overcharge, over-discharge, over-voltage and short circuits.

Suits owners needing a direct swap.

The pack fits only the listed Sony headphone models and part numbers. Buyers with different headphones or battery codes should look elsewhere. Confirm your model and part number before ordering to avoid mismatches.

39.65 x 37.96 x 6.62mm physical size decides fit

The battery measures 39.65mm by 37.96mm by 6.62mm and weighs 43.0g. If the headphone compartment differs from these dimensions the cell will not seat correctly. Verify the cavity size against these figures before purchase.

Highlights

  • Replaces Sony MDR-1RBT headset battery directly
  • 800mAh capacity restores original play time
  • 7V Li-ion matches factory voltage exactly
  • 65 x 37.96 x 6.62mm fits battery bay precisely
  • CE, RoHS, ISO9001, UN38.3 certified for safety

Specifications

BrandSONY
TypeRechargeable Batteries
Battery Capacity800mAh
Battery Voltage3.7

Questions about this item

Will the 39.65 × 37.96 × 6.62 mm pack fit my Sony MDR-1RBT headphones?

Yes — the cell matches the original SP70/SP70A/NP-SP70/SP70B dimensions and is listed as a direct replacement for the MDR-1RBT.

How do I install it, and what step do people miss?

Open the earcup compartment, disconnect the old pack, connect the new 3.7 V 800 mAh unit observing polarity, then reassemble; the step often missed is seating the connector fully before closing the cover.

What upkeep will this Li-ion 2.96 Wh cell need later?

Store at roughly half charge if unused for weeks, avoid full discharge, and replace when run-time drops noticeably — the ISO9001/RoHS/CE/UN38.3/MSDS certifications confirm baseline safety but do not eliminate normal ageing.

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