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Small black cylindrical Ni-MH battery with two terminals

Centenex Electronics

Centenex Electronics DS-CS-SRF820SL Bluetooth Headset Battery 1.2V 700mAh Ni-MH Black

SKU CH-B732-SG0QX

Replacement Ni-MH battery for Sony wireless headsets, 1.2V 700mAh capacity in a compact black cell

  • TypeBluetooth Headset
  • Ready for Sony wireless headsets with a direct-fit Ni-MH cell
  • 700 mAh capacity restores original runtime between charges
  • 2 V nominal voltage matches the factory specification
  • Compact 46.05 × 11.30 × 11.30 mm body slides into the existing battery bay
  • Brand-new OEM-compatible unit replaces part numbers 1-756-316-21 and 1-756-316-22

Replacement Battery for Sony Headsets

This Centenex Electronics Ni-MH battery replaces the Sony BP-HP550 pack used in several wireless headphone models. It delivers 1.2V and 700mAh capacity in a black housing measuring 46.05 x 11.30 x 11.30 mm. The cell is new and built to match the original 1-756-316-21 and 1-756-316-22 part numbers.

Compatibility and Limits

It suits owners of listed Sony MDR-DS, MDR-IF and MDR-RF series headsets who need a direct replacement for a depleted original pack. Buyers whose headset uses a different voltage, chemistry or physical layout should look at something else. The pack is sold as a single unit without charging hardware or tools.

Deciding Specification

The critical figure is the 1.2V 700mAh Ni-MH rating in the 46.05 x 11.30 x 11.30 mm form factor. Only headsets designed for this exact voltage, capacity and footprint will work correctly.

Highlights

  • Ready for Sony wireless headsets with a direct-fit Ni-MH cell
  • 700 mAh capacity restores original runtime between charges
  • 2 V nominal voltage matches the factory specification
  • Compact 46.05 × 11.30 × 11.30 mm body slides into the existing battery bay
  • Brand-new OEM-compatible unit replaces part numbers 1-756-316-21 and 1-756-316-22

Specifications

BrandCentenex Electronics
ModelDS-CS-SRF820SL
TypeBluetooth Headset

Questions about this item

What are the exact dimensions of this battery so I can confirm it fits my Sony headset?

The battery measures 46.05 x 11.30 x 11.30 mm. Check your headset's battery compartment against these figures before ordering.

How do I install this battery and what is the common mistake to avoid?

Open the headset's battery cover, disconnect the old pack, and connect the new one matching the polarity. The common error is reversing the connector orientation.

When will this 700mAh Ni-MH battery need replacing and how can I extend its life?

Expect 2–3 years of regular use. To extend lifespan, avoid full discharges, store at partial charge in a cool place, and recharge every few months if unused.

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