An apparatus, comprising: a positive electrode; a negative electrode; a separator, the positive electrode and the negative electrode being separated by the separator; a first conductor (212; 804; 906; 1006; 1106) configured to transmit a first electrical current from the positive electrode; a second conductor (216; 806; 908; 1008; 1108) configured to transmit a second electrical current from the negative electrode, a direction of the first electrical current transmitted through the first conductor (212; 804; 906;1006; 1106) being substantially opposite to a direction of the second electrical current transmitted through the second conductor (216; 806; 908; 1008; 1108), a magnitude of the first electrical current being substantially equal to a magnitude of the second electrical current, and the first and second conductors (212, 216; 804, 806; 906, 908; 1006, 1008; 1106, 1108) overlapping one another; a case (204; 304; 902; 1002; 1102; 1302; 1402), wherein the positive and negative electrodes (206, 208) are located inside the case, and wherein at least a portion of the first and second conductors (212, 216; 804, 806; 906, 908) are located outside the case; a positive feedthrough (244; 1308; 1410) and a negative feedthrough (246; 1310; 1408), the positive feedthrough and the negative feedthrough being spaced apart from one another by a separation distance, wherein a first portion (240; 242) of one of the first and second conductors (212, 216; 804, 806; 906, 908; 1006, 1008; 1106, 1108) is located inside the case along the separation distance, and a second portion (250; 252) of the one of the first and second conductors (212, 216; 804, 806; 906, 908; 1006, 1008; 1106, 1108) is located outside the case along the separation distance; wherein the first conductor (212; 804; 906; 1006; 1108) is attached to the positive electrode and extends across a portion of an end of the positive electrode, and the second conductor (216; 806; 908; 1008; 1108) is attached to the negative electrode and extends across a portion of an end of the negative electrode. a positive electrode; a negative electrode; a separator, the positive electrode and the negative electrode being separated by the separator; a first conductor (212; 804; 906; 1006; 1106) configured to transmit a first electrical current from the positive electrode; a second conductor (216; 806; 908; 1008; 1108) configured to transmit a second electrical current from the negative electrode, a direction of the first electrical current transmitted through the first conductor (212; 804; 906;1006; 1106) being substantially opposite to a direction of the second electrical current transmitted through the second conductor (216; 806; 908; 1008; 1108), a magnitude of the first electrical current being substantially equal to a magnitude of the second electrical current, and the first and second conductors (212, 216; 804, 806; 906, 908; 1006, 1008; 1106, 1108) overlapping one another; a case (204; 304; 902; 1002; 1102; 1302; 1402), wherein the positive and negative electrodes (206, 208) are located inside the case, and wherein at least a portion of the first and second conductors (212, 216; 804, 806; 906, 908) are located outside the case; a positive feedthrough (244; 1308; 1410) and a negative feedthrough (246; 1310; 1408), the positive feedthrough and the negative feedthrough being spaced apart from one another by a separation distance, wherein a first portion (240; 242) of one of the first and second conductors (212, 216; 804, 806; 906, 908; 1006, 1008; 1106, 1108) is located inside the case along the separation distance, and a second portion (250; 252) of the one of the first and second conductors (212, 216; 804, 806; 906, 908; 1006, 1008; 1106, 1108) is located outside the case along the separation distance; wherein the first conductor (212; 804; 906; 1006; 1108) is attached to the positive electrode and extends across a portion of an end of the positive electrode, and the second conductor (216; 806; 908; 1008; 1108) is attached to the negative electrode and extends across a portion of an end of the negative electrode.