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The S9 30W power supply is a small, lightweight power supply suitable for any S9 device that isn't being used with an H5i Heated Humidifier.

The S9 90W power supply can be used to connect any S9 therapy device running with an H5i Heated Humidifier to the mains electricity supply.

ResMed power station II is an external long-life, lithium-ion battery that simply works alongside ResMed sleep therapy devices or ventilators.