The aim of this work was to build nuclear battery based on beta radiation. Several parameters were selected to study their effects on the voltage of the battery. These parametrs were material of the collector, space between the collector and the radiation source, and thickness of the collector. Seven metals that were used in this study as collectors are brass, lead, titanium, copper, iron, aluminum and zinc. Total distance between collector and source was 3 to 18 cm with 3 cm steps. The maximum voltages produced by these collectors were, 27, 26, 19, 25, 35, 20 and 21 mV respectively. Among these collectors, lead and brass gave the best results. The potential difference increased with increasing thickness to a certain extent and then remained constant. The Thinknesses giving the highest voltage for the seven abovementined metals were 1.83, 4.83, 1.26, 3.00, 4.38, 3.66 and 0.86 mm respectively. Voltage variations based on two parameters of conductivity and density of those seven metals were drawn. The voltage increased with increasing density but a meaningful variation based on conductivity was not observed. According to the tests in this study, a collector with three layer of metals with order of brass, lead and iron as first to third layers produced the highest voltage. Keywords : Nuclear battery, Collector, Beta radiation, Strontium, Promethium, Brass, Aluminum, Iron, Zinc, Lead, Titanium, Copper