Bonanza 35
Flight Crew Private
Flight Crew Last 90 Days 65; Flight Crew Total 705; Flight Crew Type 510
Time Pressure; Workload; Troubleshooting
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Other / Unknown; Ground Event / Encounter Gear Up Landing
Flight Crew Landed As Precaution
Aircraft
Lost electrics in aircraft and cockpit went dark. Issue began with pulsating sounds in headset. Changed Comms 2 to 1 to see if [it was] a comm issue and [it] was not. Tried to call ZZZ Approach and had no PTT (Push-to-Talk) functions. At that time; I noticed the cockpit dimming fast. I changed comms and channels and made calls to ZZZ; Guard on [frequency]; and ZZZ1 Tower if anyone could hear me. Tried to operate runway lights but had no PTT functions.[I put the] gear down and the cockpit blacked out; airplane did not react as it usually does with full gear extension. Tried to input flaps but had no reaction. Opened emergency gear handle and tried to crank with a lot of thoughts running through my head. At this point; I was in complete darkness and in a left downwind for XXL. [I] had thoughts about a Tower fly-by or diversion to another airport via ForeFlight on iPhone; but without comms inside the SFRA and in a high stress situation; I committed to landing the airplane on XXL and went with it.
BE-35 pilot reported a loss of electric power inflight along with an overall loss of other aircraft functions; including proper landing gear retraction.