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Rectangular black lithium-polymer battery pack measuring 60.83 by 34.62 by 5.02 mm

Cameron & Co

Cameron & Co DS-CS-FE700SL headphone battery 3.7V 1300mAh

SKU CH-W2CQ-HXN7S

Replacement Li-Polymer battery for Fiio EO7K amplifier, 3.7 V 1300 mAh capacity

  • Product typeBluetooth Headset
  • Replacement battery restores Fiio EO7K amplifier runtime
  • 7 V 1300 mAh Li-Polymer cell matches original PL503560 spec
  • 81 Wh capacity supports extended portable listening sessions
  • Slim 60.83 × 34.62 × 5.02 mm form factor fits existing battery bay
  • Brand-new OEM-compatible unit supplied ready for immediate installation

Replacement battery for Fiio EO7K

This Cameron Sino DS-CS-FE700SL lithium-polymer cell is built as a direct replacement for the Fiio EO7K portable USB DAC and headphone amplifier. It restores the original 3.7 V 1300 mAh capacity so the device can run for its rated duration again. The pack is brand new and 100 % OEM compatible.

Thermal behaviour and power profile

The 1.3 Ah pouch cell uses standard Li-Polymer chemistry with a nominal 3.7 V output and 4.81 Wh energy rating. In normal portable-audio use it runs at low current draw, so self-heating is minimal and no active cooling is required. The flat 5.02 mm profile keeps internal temperatures close to ambient during typical listening sessions.

Fit and integration

The pack measures 60.83 mm by 34.62 mm by 5.02 mm and carries the PL503560 1S1P part reference, matching the original battery compartment exactly. Its black soft-case wrapper slides into the EO7K without modification and the existing connector aligns with the board header. No additional wiring, adhesives or firmware steps are needed for installation.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 68% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameCameron Sino
Model nameDS-CS-FE700SL
Product typeBluetooth Headset

Questions about this item

How do I install the DS-CS-FE700SL battery in my Fiio EO7K and which step is most often missed?

Open the EO7K case, disconnect the old PL503560 pack, connect the new 3.7 V 1300 mAh Li-Polymer unit observing the correct polarity, then close the case; the step most often missed is verifying the connector orientation before seating it.

What maintenance or replacement will the DS-CS-FE700SL battery need over time?

The 1.3 Ah Li-Polymer cell requires no scheduled maintenance; plan to replace it once run-time drops noticeably, typically after several hundred charge cycles.

What is the first limit reached when the DS-CS-FE700SL powers the amplifier continuously?

The 4.81 Wh capacity sets the runtime ceiling; under sustained load the pack will hit its 1300 mAh discharge limit before any thermal or voltage threshold becomes critical.

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