Review on Portable USB Charging Air Pump for Aquariums & Fishing - Great for Fish Tank, Fish Transportation, Freshwater & Marine Aquariums, Outdoor Fishing by Tiffany Villavicencio

Husband loves it. He no longer has to worry about batteries and they literally last all day. We used it in our aquarium when we had a power outage and it was still working after 7 hours. The main purpose of its purchase was bait. You can bring a rechargeable battery for extra coverage, but chances are you won't even need it. Not only does it work, you can tell it's of very high quality. It's definitely built to withstand the pressure. Last but not least, it has the wonderful thing: if the power goes out, it turns on automatically. This makes it ideal for a backup source if needed.