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Clear-Com WTR4C
Battery Recharger, 4 WBS batteries


The WTR4C is a 4-battery charger that provides built-in maintenance capability to maximize the battery cycle life for the WBS-670 and WBS-680 wireless intercom systems.
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Clear-Com WTR4C
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The WTR4C is a 4-battery charger that provides built-in maintenance capability to maximize the battery cycle life for the WBS-670 and WBS-680 wireless intercom systems. It helps to optimize the battery and maintains the battery’s peak capacity while it is charging. There is no restriction to how long the battery can remain in the charger. Rapid Charge capabilities fully charge batteries in less than 2 hours.


  • Charges up to 4 batteries simultaneously
  • Easy-to-read LED status indicator lights
  • Battery is fully charged in less than 2 hours
  • Maintains battery at peak capacity
  • Optimizes battery life
  • Battery can remain in charger indefinitely


User Environment

  • ESD: 8KV continuous contact discharge; 15KV from air to all surfaces without contact
  • Humidity: 95% relative humidity (non-condensing)
  • Drop: Unit functions normally after 4ft (1.2m) drop to concrete
  • Power Supply: 90V - 230VAC, 50/60Hz
  • Output: 15VDC, 5A or 24VDC, 4.5A

Safety Standards

  • Charger and power supply UL listed (UL1950), CSA Certified (C 22.2 No. 223): Compliant to FCC part 15 Class A and CE Marking (Electromagnetic Compatability) Directive 89/336/EEC and Low Voltage
  • Directive 73/23/EEC; C15PR-22 Class B

Performance Characteristics

  • Rapid Charging: Charges batteries to 90+% capacity in 2 hours or less
  • Complete Charge: Completes 100% capacity charge in 4 hours or less
  • Conditioning: Completely discharges battery and automatically switches to charging mode
  • Maintenance Charge: Maintains battery at optimum capacity indefinitely

User Interface

  • Power LED: Indicates POWER to charging slot
  • Conditioning/ Charging LED: Flashing indicates discharging process; Solid indicates battery pack is charging
  • Reject LED: Flashing indicates faulty battery
  • Ready LED: Solid indicates battery charged


  • Storage: -40 - 122oF (-40 - 50oC)
  • Operating: 32 - 122oF (0 - 50oC)


  • Dimensions: 13” W x 1.7” H x 7” D (330mm x 45mm x 178mm)
  • Weight: 4 lbs (1.5 kg)






Consumer Alert

This particular wireless microphone device operates in portions of the 617-652 MHz or 663-698 MHz frequencies. Beginning in 2017, these frequencies are being transitioned by the Federal Communications Commission (FCC) to the 600 MHz service to meet increasing demand for wireless broadband services. Users of this device must cease operating on these frequencies no later than July 13, 2020. In addition, users of this device may be required to cease operations earlier than that date if their operations could cause harmful interference to a 600 MHz service licensee’s wireless operations on these frequencies. For more information, visit the FCC’s wireless microphone website at www.fcc.gov/wireless-microphones-guide or call the FCC at 1- 888-CALL-FCC (TTY: 1-888-TELL-FCC).

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