Poly is experiencing a part shortage that is causing 6-8 weeks of lead time for some headset models. BTP will communicate the lead time for your line items and do our best to suggest alternate models depending on the stock availability. We appreciate your patience.

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Battery for CS50, CS55 & AWH55 – DISCONTINUED

Discontinued – Click for more info
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Every order includes unlimited lifetime support from our Headset Helpdesk, saving you time and money.

Replacement Battery for Plantronics CS55, CS50 & Avaya AWH55+ Wireless Headset Systems

  • Manufacture Discontinued – please order PL-64399-03
  • Lithium Ion Polymer (Li-Ion) battery
  • Actual size: 3/4″ X 1-1/4″ X 1/8″ inch thick
  • To replace the battery in the CS55/CS50, firmly squeeze both sides of the battery door cover and lift upward
  • Fully recharge the battery in less than 3 hours
  • 80% recharged in 1.5 hours
  • Genuine Plantronics accessory
  • Provides 8 hours talk time in the CS50 Wireless Headset (900 MHz technology)
  • Provides 10 hours talk time in the CS55 Wireless Headset (1.9 GHz technology)
  • Can be used in place of 64399-03
  • 3.75v, 190 MAh
  • Also has part number 65358-01 marked on this battery
  • Note: not interchangeable with battery for Plantronics Savi series or CS540 wireless headset
BTP Model: PL-64399-01
MFR Part: 64399-01

Additional information

Weight 0.0625 lbs
Dimensions 6.00 × 4.25 × 0.75 in


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Call: 800-457-4287 or 425-649-9262

Email: info@btpi.com

Manufacturer discontinued.


“Thank you so much for the prompt, detail oriented and efficient effort with my order. You can now call me a repeat customer because of this, as this wasRead more

Christine B., Seattle, WA
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