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I use this for the same reason. For how long it lasts depends on what is connected to the battery section. For me it should last about 5 hours.
Sorry, there was a problem. Please try again later.The modem isn't going to pull much power. This backup should provide a few hours of power if that is all that is plugged into it.
Sorry, there was a problem. Please try again later.Hello, This product is meant to allow the graceful shutdown of connected equipment and is not meant to keep equipment running until power is restored. If you would like to review how long the unit can support a specific load, you can the run time chart via the link below. https://www.cyberpowersystems.com/product/ups/pc-battery-backup/sx950u/ Thank you for your question.
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