Review on AQQA Aquarium Lithium Battery Air Pump - Multifunctional, Rechargeable, Energy-Saving, and Quiet Oxygen Pump with One/Dual Outlets, Air Stone, and 2600mAh Battery - Suitable for Indoors, Power Outages, and Fishing by Paula Pickett

works great! Ideal as a backup in the event of a power failure. It comes with two hoses and two air stones. As you can see in the video, it does a great job with a 120-gallon tank and 24-inch depth. So it has enough power, but is still very quiet. But the interval function is great. It turns on and off every 10 seconds to save power, which should run it for over 24 hours on a single charge. I made a video on how to do it but I can't upload a second video. But it's great when the power goes out or I have to transport the fish a long way.