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 Tiffany Thompson

Wow, I'm really impressed! I'm just starting out in hydroponics (gardening in general) and this little guy is giving me the confidence I need to set up my little herb system. Thanks to the rechargeable battery, it is surprisingly powerful, durable and reliable when there is no power connection. It would be great if it came with a check valve but they are so ridiculously cheap I won't complain. So far everything works great! I will update this review if this changes.