Cordless Cat Water Fountain with Motion Sensor, 68 fl oz (2 L)

This is a compact countertop fountain for cats, with a 2-liter (about 68 fl oz) water tank in white plastic and a pump unit that sits on the rim. A rechargeable 2,500 mAh battery powers it, so there is no cord running across the floor to chew or trip over.

It has two flow modes. In motion-sensing mode, it detects a cat within about 59 inches (150 cm) over a 120 degree angle and runs the water for 10 seconds. In intermittent mode, it runs for 10 seconds on a 60 minute cycle, which stretches the battery to around 7 days. A 3-layer filter sits in the unit; change it every 2 to 4 weeks.

The fountain measures 8.27 inches long, 5.51 inches wide and 6.50 inches tall (21 x 14 x 16.5 cm), so it fits on a shelf or beside a bowl without taking over the counter. The water side is separated from the electronics, and the tank, pump unit and filter holder come apart for cleaning; most parts can go in the dishwasher. A tone confirms that you have put it back together correctly. Operating noise is rated at 30 dB or less, though a cat that is nervous around moving water may still need a few days to try it. Keep it filled above the pump, as with any fountain.