Sun NVRAM battery hackery - later models

Am 15.09.14 21:59, schrieb JP Hindin: Usually the quartz is at the pin 1 half and the battery is at the other. File the top of the battery part of the resin down until you get to the battery. Work your way into the resin flat from top to bottom. You will get to the + pole of the battery. There is a spot welded lead from the top of the battery going 90 degrees around down into the resin. You can prepare it with a cutter or with a Dremel like tool and a very small milling head. I use a broken 0.6 mm drill for this. Once you freed enough of the + lead cut it loose from the battery at the top, solder a wire to it and cover it with hot glue. Connect the - pole of the new battery to the GND pin of the chip. I leave the dead battery in place. I never had any problems with leakage from lithium coin cells. It sounds more complicated then it is. If you did it once you will know where everything is. If you do it again you will get it done much faster. For me this surgery is a matter of minutes. -- tsch??, Jochen