The SimplyGo External Battery Module allows you to connect a second battery to double the time you are able to spend away from an AC or DC power source. The External Battery Module plugs into the SimplyGo Portable Oxygen Concentrator and fits into the front zippered pouch of the SimplyGo carry case. When in use, power is first drained from the external battery and then automatically switches to the battery inserted in the SimplyGo. Product includes a 90 day warranty.
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