Review on 🔋 TERAPUMP TRHD03 2D Battery Operated Transfer Pump with Auto-Stop System and Leak Protection - Efficient Liquid, Gas, and Water Transfer by Dan West

The motor seems to rev at a very high speed but is very quiet. I don't think it drains the batteries much. The case is solid and, in my opinion, hermetic. I don't know if it has a filter but I don't think it can be taken apart for cleaning. So far it has drained fine debris from my garden fountain without clogging. I timedly filled a 3 gallon bucket, first with the bucket under the pump and then evenly. Both times it took just over 1 minute to fill the bucket. It lowers the water to about 1/4 inch before sucking in air. The auto shut off was shaky and I think they manage without them which I would happily buy. The outlet pipe is short so consider where you want the water to end, overall it's pretty good and not junk.