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Small rectangular lithium-ion battery with blue label, 35.55 by 19.04 by 3.55 mm

Centenex Electronics

Centenex Electronics 300 mAh 3.7 V Li-ion Battery for Plantronics CS50 CS55 HL10 CS351N CS361N CS50-USB

SKU CH-W42B-MRGVF

A 300 mAh 3.7 V lithium-ion replacement battery compatible with Plantronics CS50, CS55, HL10, CS351N, CS361N and CS50-USB headsets

  • Wireless TypeHeadset Battery
  • 300 mAh capacity powers compatible Plantronics headsets through a full workday
  • 7 V lithium-ion chemistry delivers steady voltage for reliable wireless talk time
  • 11 Wh energy rating fits the original specification for CS50, CS55, HL10, CS351N, CS361N and CS50-USB models
  • Japanese cells provide consistent discharge performance in a compact 35.55 × 19.04 × 3.55 mm pack
  • Direct replacement for OEM part numbers 65358-01, 64399-01, 64327-01 and PLN-6439901

Replacement battery for Plantronics headsets

This 300 mAh 3.7 V Li-ion cell replaces the original battery in Plantronics CS50, CS55, HL10, CS351N, CS361N and CS50-USB headsets. It matches part numbers 65358-01, 64399-01 and 64327-01 for direct compatibility. Office workers and call-centre agents who need reliable talk time will find it a suitable spare.

Check connector and dimensions before ordering

Verify that your headset uses the listed Plantronics part numbers and that the battery cavity can accept a pack measuring 35.55 x 19.04 x 3.55 mm. The cell is built with Japanese cells and rated at 1.11 Wh. Buyers whose headset requires a different voltage, capacity or form factor cannot use this unit.

Slim pack with wire leads for drop-in fit

The thin 3.55 mm profile and pre-attached leads allow the battery to slide into the existing compartment without modification. Quality Japanese cells support stable output over repeated charge cycles. Users who need a higher-capacity pack or a different chemistry will have to source an alternative solution.

Highlights

  • 300 mAh capacity powers compatible Plantronics headsets through a full workday
  • 7 V lithium-ion chemistry delivers steady voltage for reliable wireless talk time
  • 11 Wh energy rating fits the original specification for CS50, CS55, HL10, CS351N, CS361N and CS50-USB models
  • Japanese cells provide consistent discharge performance in a compact 35.55 × 19.04 × 3.55 mm pack
  • Direct replacement for OEM part numbers 65358-01, 64399-01, 64327-01 and PLN-6439901

Specifications

BrandCentenex Electronics
Wireless TypeHeadset Battery

Questions about this item

Does the battery come with tools or connectors, or must they be purchased separately?

The package contains only the 300 mAh 3.7 V Li-ion cell measuring 35.55 x 19.04 x 3.55 mm; no tools, cables or additional connectors are included.

How do I confirm this 300 mAh 3.7 V battery matches my Plantronics headset version?

Match the original part number — 65358-01, 64399-01, 64327-01, PLN-6439901, ED-PLN-6439901, 6535801, 4600003XA or 51000100 — and the model list CS50, CS55, HL10, CS351N, CS361N or CS50-USB.

What does the 1.11 Wh rating mean for daily talk time in a CS55 headset?

The 1.11 Wh capacity restores the original runtime specification for the CS55, delivering the same talk and standby duration as the factory-fitted cell when fully charged.

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