Power Power was provided by two radioisotope thermoelectric generator (RTG) units containing plutonium-238 affixed to opposite sides of the lander base and covered by wind screens. Each Viking RTG was tall, in diameter, had a mass of and provided 30 watts of continuous power at 4.4 volts. Four wet cell sealed nickel-cadmium 8 Ah (28,800 coulombs), 28 volt rechargeable batteries were also on board to handle peak power loads.
Power Power was provided by two radioisotope thermoelectric generator (RTG) units containing plutonium-238 affixed to opposite sides of the lander base and covered by wind screens Each Viking RTG was tall in diameter had a mass of and provided 30 watts of continuous power at 44 volts Four wet cell sealed nickel-cadmium 8 Ah (28800 coulombs) 28 volt rechargeable batteries were also on board to handle peak power loads