A hinge for a notebook computer is composed of a pintle and two barrels. The hub has an axial bore of a size to fit with very close clearance on the shaft while still permitting the disk to freely slide against a low spring force. The cathode employs a cathode active material containing a compound of the olivinic structure represented by the general formula LixFe1-yMyPO4, where M is at least one selected from the group consisting of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0. In one example, a boundary of the air gap adjacent the inner circumferential surface of the jacket is arc shaped. Then, Boolean operations, sizing, OPC corrections and phase shifting are performed, as needed, perhaps using third party tools.