Cylindrical cells with protruding positive and recessed or flat negative terminals. The positive terminal will be concentric using the cell overall. The entire height of the cell is not necessarily identical to the total distance between terminals .This accounts for nubs, recesses and hp 593553-001 casings. The cell casing is insulated. hp 593553-001 Category 2: Cylindrical cells with protruding positive and protruding or flat negative terminals. The total height from the cell is equivalent to the entire distance between terminals. The cell casing is insulated. Eg. CR14250, LR61

Category 3: Cylindrical cells with flat positive and negative terminals. The entire height of the cell isn't necessarily identical to the total distance between terminals (This accounts for any protuberances from the negative terminal). The cell casing is within connection with the positive terminal. No area of the cell is permitted to protrude from the positive terminal surface. Eg. CR11108, LR9

Category 4: Cylindrical cells with a protruding flat negative terminal. The total height of the cell is equivalent to the total distance between terminals. The cell casing is the positive terminal which is recommended that the outer surface can be used for positive connection even though it is possible from the base. No part of the cell is allowed to protrude from the positive terminal surface. Eg. LR44, CR2032.Examples of the IEC nomenclature are batteries coded HP laptop batteries recalled for overheating and LR2616J. The letters and numbers in the code indicate the number of cells, cell chemistry, shape, dimensions, the amount of parallel paths in the assembled hp 593553-001 and any modifying letters deemed necessary. A multi-section hp 593553-001 (several voltages in the same package) will have a multi-section designation.