A capacitor, comprising: a single tantalum anode element comprising a pressed powder and having a bottom surface, a top surface, and side surfaces and further having an anode wire extending from the top surface; a feedthrough barrel surrounding at least a portion of the anode wire and including an insulating material; a cathode element electrically distal to the anode element; and a capacitor case including: a first case portion, a first opening portion formed in an edge of the first case portion and comprising a first mating portion, a slot formed adjacent the first mating portion, the slot extending a depth into the edge of the first case portion, the depth being longer than a radius of the feed through barrel, the anode positioned in the first case portion adjacent the bottom surface, the first case portion closely conforming to the shape of the anode element at the bottom surface and the side surfaces, the first case portion configured to allow for linear insertion of the anode element; and a second case portion having a top surface, a bottom surface and side surfaces, the top surface including a protrusion extending from an edge of the top surface, a second opening portion formed in the protrusion and comprising a second mating portion, the top surface of the second case portion being adjacent the top surface of the anode when the anode is positioned in the casing, the protrusion configured to rest against an outer surface of the first case portion when the first case portion and the second case portion are joined, the first and second case portions (112, 114) are made of metal and form an enclosure for the anode element, the cathode element and at least parts of the feed through barrel and an opening formed by the first and second mating portions (162, 166) is configured to mate with the feed through barrel, wherein the feed through barrel is sealed to the first mating portion and the second mating portion. a single tantalum anode element comprising a pressed powder and having a bottom surface, a top surface, and side surfaces and further having an anode wire extending from the top surface; a feedthrough barrel surrounding at least a portion of the anode wire and including an insulating material; a cathode element electrically distal to the anode element; and a capacitor case including: a first case portion, a first opening portion formed in an edge of the first case portion and comprising a first mating portion, a slot formed adjacent the first mating portion, the slot extending a depth into the edge of the first case portion, the depth being longer than a radius of the feed through barrel, the anode positioned in the first case portion adjacent the bottom surface, the first case portion closely conforming to the shape of the anode element at the bottom surface and the side surfaces, the first case portion configured to allow for linear insertion of the anode element; and a second case portion having a top surface, a bottom surface and side surfaces, the top surface including a protrusion extending from an edge of the top surface, a second opening portion formed in the protrusion and comprising a second mating portion, the top surface of the second case portion being adjacent the top surface of the anode when the anode is positioned in the casing, the protrusion configured to rest against an outer surface of the first case portion when the first case portion and the second case portion are joined, a first case portion, a first opening portion formed in an edge of the first case portion and comprising a first mating portion, a slot formed adjacent the first mating portion, the slot extending a depth into the edge of the first case portion, the depth being longer than a radius of the feed through barrel, the anode positioned in the first case portion adjacent the bottom surface, the first case portion closely conforming to the shape of the anode element at the bottom surface and the side surfaces, the first case portion configured to allow for linear insertion of the anode element; and a second case portion having a top surface, a bottom surface and side surfaces, the top surface including a protrusion extending from an edge of the top surface, a second opening portion formed in the protrusion and comprising a second mating portion, the top surface of the second case portion being adjacent the top surface of the anode when the anode is positioned in the casing, the protrusion configured to rest against an outer surface of the first case portion when the first case portion and the second case portion are joined, the first and second case portions (112, 114) are made of metal and form an enclosure for the anode element, the cathode element and at least parts of the feed through barrel and an opening formed by the first and second mating portions (162, 166) is configured to mate with the feed through barrel, wherein the feed through barrel is sealed to the first mating portion and the second mating portion.