All good points - I switched my two 8201a's to 3F supercaps after losing a 20-year-old 386 to a leaking NiCd RTC battery, some 8
years ago now. Basically a drop-in replacement, with no issues to date. My memory retention scheme is to keep Eneloop AAs in the laptops - Their low self-discharge seems to keep RAM alive forever, & the supercaps cover battery replacement, for several weeks in the few tests I've run - I don't actually know how long the caps will retain memory without the battery. Do Eneloops/supercaps leak? There are a few reports online, but it seems to be an unusual problem - Which is'nt the case with NiCds. If NiCd is the only option I'd change it regularly - 5 years is probably overkill - 10 years probably is'nt. On 9/10/18, Brian White <[email protected]> wrote: > I believe other people have reported mixed results replacing the battery > with a cap. Some people have had good luck, others not, and some said it > worked fine on their 100's but not their 200, etc. > The battery should really only be a nicd or nimh. I think the idea for the > caps was they wouldn't leak, but they leak and degrade too because they are > not solid state. > > The only advantage I can see to caps is that caps aren't hurt by sitting > dead, even for long periods, while draining all the way dead, and > especially staying dead for any time does hurt batteries. > > > On Mon, Sep 10, 2018 at 9:50 AM Josh Malone <[email protected]> wrote: > >> On Mon, Sep 10, 2018 at 9:32 AM Gregory McGill <[email protected]> >> wrote: >> > >> > Flakey memory power switch? >> >> When I got the machine, I was initially suspicious of the memory power >> switch, so I cleaned it with alcohol. >> >> However, if it were the memory power switch, why would it power up >> after the external power was removed and re-applied. Genuinely curious >> as to ways this could happen. I'm not familiar enough with the M100 >> power circuit and I haven't had time to study the schematic like I'd >> hoped. :-/ >> >> -Josh >> > > > -- > bkw >
