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  • ResMed Power Station RPS II CPAP Battery
  • RPS II CPAP Battery Connected to S9 CPAP using S9 DC Cable for RPS II (CPAP Machine Not Included)
  • RPS II Battery Charging Using  PSU & S9 External Power Supply (Power Supply & Extension Cord Not Included)
  • Power Supply Unit (PSU) Adapter for ResMed Power Station (RPS) II
  • Overview of CPAP DC Cables and Batteries
ResMed Power Station RPS II CPAP Battery
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ResMed Power Station II Battery Kit for S9™ Machines


$669.95 $699.00
21 Reviews
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ResMed Power Station II Kit for S9 Overview

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This Battery Kit features the ResMed Power Stations (RPS) II and comes with all the parts needed to run a ResMed S9 Series machine. The ResMed Power Station II is a long-life, lithium-ion battery. It is suitable for home or travel. It can be used with all S9 Series CPAP or VPAP units including the use of the humidifier. Use the standard S9 power supply and cord to charge the battery.

This product is not currently available for expedited shipping within the continental U.S. Regular ground shipping will be the only options. Other options may be available for non-continental U.S. residents.

The ResMed Power Station II Battery Kit for S9™ Machines includes the quick-charge lithium-ion battery, the power supply adapter specifically designed for S9 machines, and the S9 Series DC Cable for ResMed Power Station II. This kit may be used for camping and traveling as well during a power outage. The ResMed Power Station II Battery Kit can provide double the run time if needed. User the Battery Coupler for ResMed Power Station (RPS) II to connect the two ResMed Power Station II batteries. To review more information on the battery and its potential run time, visit the ResMed Battery/Device Compatibility List.


  • Lithium-ion Battery
  • Charges to 95% in Under Four Hours
  • Informational Battery Charge Display
  • Meets IATA Transportation Regulations
  • Audible & Visual Re-charge Alerts
  • Optional Battery Coupler Joins Two Batteries to Extend Run Time
  • Travel Bag
  • Home, Travel, or Hospital Usage

Lithium-ion Battery

The RPS II is a long lasting, lithium-ion battery that meets transportation regulations as set by the International Air Transportation Association (IATA). Use the standard External Power 90 Watt Supply for ResMed S9 Series CPAP and BiPAP Machines that comes with the S9 machine to charge the battery. The battery charges quickly reaching 95% of the charge in less than four hours when starting at 0% charge. The battery can be charged from input voltages between 100V and 240V.

The RPS II's battery charge display indicates the charge level and offers both visual display and audio alert, which may be muted, to notify when the charge is low. Use the voltage output selector on the back panel of the RPS II to change from 24v to 26 v power. Note: All S9 CPAP and VPAP devices require 24v.

Double the Batteries - Double the Run Time

A unique feature of the RPS II is the Battery Coupler for ResMed Power Station (RSP) II which connects two ResMed Power Station II Batteries in series. The Battery Coupler automatically switches from one battery to the other when needed. The Battery Coupler Kit for ResMed Power Station (RSP) II includes both the Battery Coupler and a Velcro Strap for ResMed Power Station (RPS) II to secure the batteries to one another. Additional RPS II Batteries may be purchased separately.

Travel Bag

The RPS II Travel Bag offers several great features of its own. It is designed to be used with either one or two RPS II batteries. Use the access panel to connect the S9 Series DC Cable for ResMed Power Station (RPS) II or Power Supply Unit (PSU) Adapter for ResMed Power Station (RPS) II to the RPS II. The front, zippered pouch has ample room to store cables.

Compatible ResMed S9 Machines with this Battery Kit

Non-Compatible Machines

The ResMed Power Station RPS II will not work the following machines:

  • S8 VPAP™ Auto
  • All S8 Series CPAP machines
  • All non-S9 ResMed machines, unless listed as compatible above
  • All non-ResMed CPAP or BiLevel machines
  • All CPAP or BiLevel machines not listed as Compatible above

Battery Run Time

Battery run time varies greatly based on the machine used, the pressure setting and whether or not a humidifier or heated tube are used. A ResMed S9 CPAP machine set at a pressure of 10 cmwp without a heated humidifier has an estimated run time of 13 hours. Using a heated humidifier or heated tubing greatly reduce the run time of the battery. Please reference the ResMed Battery/Device Compatibility List for more information on battery run time.

Please contact with questions. Call toll free: 1-800-356-5221 or email to

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