The Invacare Stratos Portable Plus Battery Pack IRC1731 is for those that need a battery or a backup for the Stratos Portable Plus Aerosol Compressor. The battery charges quickly and lasts for a full 90 minutes per full charge. The Portable Plus Battery pack is perfect for taking on vacation or for times when you are travelling. The battery is small and compact so it can easily fit in any bag, suitcase, or anywhere you want to put it while travelling. Buy your Stratos Portable Plus Battery Pack IRC1731 from ActiveForever.