On 01/22/2017 10:57 AM, allison wrote: > I don't know about most people but this solution has been around for > decades. > > I locate the battery on the failed part with a small magnet, then > grind the epoxy down to it then pick it out with a sharp pointed > tool. Once I expose the connection point I older two wires then > epoxy a small coin-cell holder in that spot and it s done. I've done > this more times than I care to count and its effective and the > replacement battery some over 10 years old now have not failed. But > just in case I have a bag of NOS replacements (and pulls from > socketed boards) all with dead batteries from age. There is no magic > to this.
It's worth noting that the original post was about fabricating a replacement using the DS12885A RTC chip. However, most old PCs used the DS1285 RTC (inside of a DS1287 module). The DS12885A is supposed to be drop-in compatible with the DS1285, but apparently, in some cases is not. So there's logic in reworking the old DS1287 modules, as the DS1285 chip is long out of production--you'll most likely have to be content with pulls or the occasional NOS lot. --Chuck
