VOLUAS Replacement Battery Main Control Module

Replacement battery compartment for VOLUAS 309B cat water fountain Compatible only with VOLUAS 309B battery-operated fountains Built-in 4000mAh rechargeable battery Supports up to 30 days of cordless use Helps keep water flowing during power outages or short trips White plastic design matches the original fountain Measures 4" L x 3.5" W x 5.7" H Weighs 2.5 lbs Check compatibility before purchase to avoid ordering the wrong part