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 Keep your aquarium water well-oxygenated and your fish healthy in absolutely any scenario — even when the power is out. The Aquarium Co-Op air pump utilizes a rechargeable lithium-ion battery and can be run continuously for up to 8 hours on a charge. It can be plugged into a wall outlet like a standard air pump or powered using an external USB battery bank for portable use. The included power cord is over 11 feet long, allowing you more flexibility on placement.Â