Thank you for the feedback. The Yard Enforcer is built to power your sensor/sprinkler for 7500 activation cycles per each set of four AA batteries, which (if we assume complete battery replacement just once per year) works out to over 20 different instances of sprinkler activation every day. Please feel free to contact our Support team via social media or at 1-800-488-6156, and we'd be more than happy to do all we can to help.