> -----Original Message----- > > Would this be suitable for a model 100? > https://vetco.net/products/super-capacitor-100000-956-f-5-5- > volts?taxon_id=1892
The primary problem with this one is the lead spacing is too close - it's 5mm but the original battery is about 3/4 of an inch long with the pins at each end (approximately 19mm, although I haven't precisely measured the hole spacing on the PCB). If the cap had longer leads or if the spacing were close to 19mm you could bend them to fit. It would be really handy to find a cap in this form factor which would just drop into the existing holes, although the diameter might be too large for the available space on the PCB. The one I used (on Kurt's recommendation - https://www.ebay.ca/itm/5Pcs-Lot-5-4V-1-5F-1-5Farad-Super-Capacitor-Supercapacitor-Ultracapacitor-EDLC/262404152018?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649) had long leads which I just bent as needed to fit the holes. In my M100 I laid it on its side on top of some other components to the right; in my T200 there was enough free space above it to let it stand vertically in the same spot where the original battery was. I'm not sure if there are any other electrical considerations, but afaik a cap this size ought to work... expect shorter memory/RTC retention times than we've seen with a larger cap, but I'd expect at least 30-60 minutes in an M100 and maybe 15+ minutes in a T200 (these are wild off-the-top-of-my-head estimates based on what I've seen in my own machines with a 1.5F cap). The upside of a smaller cap would be a shorter charge time, which can be kind of a pain in the T200 when starting it up with zero charge in the cap. I guess the ideal supercap for easy fitment would be something with axial leads, maybe 15mm or less in length, or one in the same form factor I used but not quite as tall. jim
