I'm not asking why replace the old battery. I'm asking why use a cap if it will have the same disadvantages plus an extra disadvantage of only delivering a fraction of the run time?
I replace all mine with new nimh batteries. I could see dropping to a few hours or days of sleep time if you gain the advantage of a part that might last even longer than 30 years and there's nothing to leak and corrode even if it does fail some day. Then you are making the unit safe for indefinite long term forget about it storage. But an electrolytic cap makes no sense to me at all. -- bkw On Jan 4, 2018 3:20 PM, "Peter Vollan" <dprogra...@gmail.com> wrote: > IMHO you should check them for correct voltage and replace them as > necessary. If allowed to discharge, they may corrode and damage the > PCB. I think the feeling around here is that the correct supercap may > be better than the nicad battery, as well as the fact that the nicads > are getting hard to find. > > > On 4 January 2018 at 02:16, VANDEN BOSSCHE JAN > <jan.vandenboss...@vivaqua.be> wrote: > > > > I have some 10+ Model Ts, 100, 102 ,200 ,O.M-10 ,N.8201. But so far, I > have never changed the NiCd (?) battery in any of my machines. > > > > Now, should I be worried? Most of the machines I have are simply in > storage. (cold & dry) Typically, I launch 1 or 2 machines (always the same > ones) maybe once every 2-3 months. So, they don't get much usage. > > > > How can I tell that the backup-battery is going on the machines that I > use? > > And those I don't use, are they safe? > > > > The caps that can replace the batteries, are they indistructible, or > will they leak, explode, desintegrate, ... too ? > > > > Greetings from the TyRannoSaurus > > Jan-80 """"" > > @ work ( / \ ) > > --------------.ooo--(_)--ooo.--- > > > >> -----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 > > [http://www.vivaqua.be/facebook.png] Rejoignez-nous sur Facebook - Volg > ons op Facebook > > > > DISCLAIMER > > Pensez à l'environnement, n'imprimez cette page et ses annexes que si > c'est nécessaire. Ce message électronique, y compris ses annexes, est > confidentiel et réservé à l’attention de son destinataire. Si vous n'êtes > pas le destinataire de ce message, merci de le détruire et d’en informer > l’expéditeur. Toute divulgation, copie ou utilisation de ce mail est dans > ce cas interdite. La sécurité et l'exactitude des transmissions de messages > électroniques ne peuvent être garanties. > > Denk aan het milieu; druk deze pagina en de bijlagen alleen af als het > nodig is. Dit e-mailbericht (inclusief zijn bijlagen) is vertrouwelijk en > is uitsluitend bestemd voor de geadresseerde. Als dit bericht niet voor u > bestemd is, wordt u verzocht het te wissen en de afzender te informeren. > Het is in dat geval niet toegestaan dit bericht te verspreiden, te kopiëren > of te gebruiken. We kunnen niet garanderen dat de gegevensoverdracht via > het internet veilig en nauwkeurig is. >
