This 4-1/2" diameter Pump and Battery Compartment is for use with the 2018 Self Contained Fountain Tower. No tools needed for assembly. Requires 4 D Cell batteries. Replace batteries by turning the rotor-style nob on top of battery compartment to open it.
BATTERY SERVICE LIFE
The below results in 2019 were using Duracell D size Alkaline batteries:
1 hour each day: 93 days / 93hours
2 hour each day: 44 days / 88 hours
3 hour each day: 29 days / 87 hours
4 hour each day: 22 days/ 88 hours