Cat water fountains · Choose by your needs
If you need both a rechargeable fountain and an accessible pool that remains when pumping stops, Catit PIXI UV-C #43761, PETKIT EverSweet Max Cordless P4115 and PetSafe HydroSphere Cordless are the documented matches. Their battery modes are different—sensor or timed, hourly interval, and motion-triggered—and retained water is not a measured outage reserve or a circulation guarantee.
Comparison updated 29 October 2026.
| Model | Model | Rechargeable plan and retained-water evidence | Important limit |
|---|---|---|---|
| Catit PIXI Stainless Steel UV-C Fountain 43761 | Catit PIXI Stainless Steel UV-C #43761 | Battery sensor or timed bursts; drinking surface retains water | Timed battery mode is 12 seconds every 15 minutes; not a measured reserve. |
| PETKIT EverSweet Max Cordless EverSweet Max Cordless P4115 | PETKIT EverSweet Max Cordless P4115 | Battery interval plan; some water remains at the surface | Default is about 25 seconds per hour; app frequency may change it. |
| PetSafe HydroSphere Cordless 60 oz PWW00-18313 Black / PWW00-18311 White | PetSafe HydroSphere Cordless PWW00-18313 | Battery motion flow; its acclimation guide describes water available while off | That is not an outage-duration or retained-volume claim. |
Choose it when: The exact #43761 facts confirm retained water at the drinking surface and a rechargeable sensor-or-timed operating plan.
The limit: The timed plan is a brief pulse, while sensor flow is pet-triggered. The sources do not quantify the retained pool or promise how long it stays accessible.
Choose it when: The exact P4115 record confirms both a retained surface pool and its rechargeable interval operating plan.
The limit: Its guide defaults to a short hourly interval; that is not continuous battery circulation. The retained-water source gives no amount or safe unattended duration.
Choose it when: The exact Cordless acclimation instructions describe leaving the fountain powered off until a hesitant pet drinks, and the setup guide documents a separate rechargeable motion-flow plan.
The limit: The powered-off instruction is for introduction to the fountain, not evidence of a quantified backup reserve. Its battery mode is motion-triggered; continuous flow uses USB power.
A stopped pump does not necessarily leave the drinking surface dry, but retained water is passive. It does not run the pump or promise that a particular amount will remain for a particular number of hours. Compare the exact accessible surface, then keep checking and cleaning the fountain.
Catit #43761 offers brief sensor or timed battery operation, P4115 uses a rechargeable interval schedule, and HydroSphere Cordless uses motion-triggered flow when unplugged. Their manuals separately describe outlet or USB operation; do not transfer a plugged-in continuous mode to the battery plan. For passive open-bowl retention without a rechargeable pump, see the broader retained-water comparison.
No. A retained surface is passive water remaining after the pump stops. The battery plans may power the pump in their documented modes, but this retained-water condition alone gives no circulation, outage duration or volume guarantee.
No. The exact instructions describe introducing a hesitant pet to the fountain with it switched off. They do not specify a reserved volume or how long water remains available.
Do not infer battery continuous flow from a retained pool. Catit #43761 and P4115 document timed battery schedules, and HydroSphere Cordless documents motion flow on battery; continuous operation is a separate plugged-in plan where documented.
