Well I read the same wave-offs regarding my old IBM laptop battery (Ni-my). With having spent $120 on a replacement I figured why not? I had to use a sharp knife to split the seams. It may be necessary to use a heavier tool like a hammer or vice-grip (use your imagination). Carefully split the seams open all round, taking care not to damage the internals. Note that the seams may not for whatever reason follow a straight line. Prise the halves apart taking care not to break them. The battery of cells should be removable at this point. Now for the delay in progress. You probably have no clue as to what to ask for. Carefully measure the dimensions of one of the cells. Draw a rough sketch of the cell upon which to record the information. If you're lucky there may be a manufacturer's part number on it. If not, you'll have to reference these measurements with a distributor's literature or catalogue to get the right item(s). Sometimes due to progress you'll find a significant improvement in capacity over the old...