Cessna 150 pilot reported the loss of electrical power and returned to the departure airport.

Narrative

After takeoff and when I started turning into the right base of Runway XX as directed. The transponder started blinking. I troubleshooted the transponder by turning on and off but the blinking didn't go away. When I was abeam with the Tower to make ZZZ Departure; very bad static started when I was trying to communicate with the Tower and all communications and transponder completely failed. I tried to troubleshoot by turning avionics on and off and Master/Alternator off and on; but I couldn't get communication or transponder back to work. I turned left to avoid ZZZ's airspace and tried to find a way to contact ZZZ1 Tower to get authorization to land. However; I couldn't find any direct line to communicated even with my phone and realized that I was losing all the interior and exterior lights as well. Then; I decided that it would be safer to land and communicate with ZZZ1 Tower afterward before I lose all electricity. Gladly; the flaps worked; and I had a separate ADS-B IN connected to my Foreflight app and could land safely by checking my surrounding traffic. After safely landing and taxing back to FBO ramp; I talked to the Airport Manager to get a phone number for the Tower crew and was able to talk about what happened and why I had to make a [priority] landing.