My two cents worthŠ. In terms of supercaps it depends on the type. If they are electrolytic supercaps then they have a lifetime of about 10-20 years, the same as NiCds, depending of course on how they are used. If they are abused thermally or electrically then they have to be derated and their lifetime can be drastically reduced. They can leak especially the cheaper versions that many people use to replace the memory batteries. In the memory backup application they are probably well within their performance limits. Current is one of the biggest derating factors, either charge or discharge.
The NiCds have a similar life span of 10-20 years depending of course on the quality of manufacture. All the Ts and NEC machines are well past their NiCd lifetimes and they could fail or just keep going for a little longer. The only way to tell is to visually inspect them and measure their charged voltage. They should show around 3.6V, if they are charged and at a lower voltage then they are failing. Ones I have seen fail to charge beyond 1V. Storage is a good question. I was thinking of packing mine in sealed plastic bags with a desiccant to reduce the humidity. Then storing them in a bedroom closet to keep the temperature as constant as possible and out of the light. I would not store them in an attic, basement or garage where there could be large variations in temperatures. I am quite concerned about the LCD screens which might suffer the most under extreme temperatures. On 4/1/18, 4:16 AM, "M100 on behalf of VANDEN BOSSCHE JAN" <[email protected] on behalf of [email protected]> 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://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fvetco.n >>et%2Fproducts%2Fsuper-capacitor-100000-956-f-5-5-&data=02%7C01%7C%7C91334 >>bb404b844f9974008d5535c2b58%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C >>636506577682022520&sdata=hN4tohczUgzmArviCvw2f5xrDvg84Yfwf3d6bNLaP2A%3D&r >>eserved=0 >> 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://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ebay >.ca%2Fitm%2F5Pcs-Lot-5-4V-1-5F-1-5Farad-Super-Capacitor-Supercapacitor-Ult >racapacitor-EDLC%2F262404152018%3FssPageName%3DSTRK%253AMEBIDX%253AIT%26_t >rksid%3Dp2057872.m2749.l2649&data=02%7C01%7C%7C91334bb404b844f9974008d5535 >c2b58%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636506577682022520&sdat >a=Xunx%2F4DOJ%2Ft9kGJ%2B00PJw2haI3NyJKZFdWQj5QISlP8%3D&reserved=0) 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 >[https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.viva >qua.be%2Ffacebook.png&data=02%7C01%7C%7C91334bb404b844f9974008d5535c2b58%7 >C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636506577682022520&sdata=adlO0 >PnB0XAgi16Q8DFvcTLX4hhS%2BTSxpgyp36iMOPQ%3D&reserved=0] 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 l¹attention de son destinataire. 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