No, assuming the battery charger is even a remotely recent design it is measuring the voltage of the battery so you would have to have something there for it to measure. And I am pretty sure these chargers are actually pretty smart. I have one of these fios boxes too.
On Saturday, May 23, 2015, Dawes, Andrew M. <[email protected]> wrote: > You would have to fake out the battery charger into thinking it is at > voltage. > > Yes, so I guess my question was: would a zener diode rated at the battery > voltage do that, or does it depend on the implementation of the charger? > > They have tested good used batteries that will fit at surplusgizmos for > $10. > > Good to know, thanks! > > -Andy > > > > On May 23, 2015, at 11:29 AM, Dawes, Andrew M. <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > > I have a battery backup system as part of my Fiber-to-the-home service > from a certain regional telecom provider. The battery for this system is a > 12V sealed lead-acid battery (not unlike a golf cart or scooter battery). > The trouble is that there is a system alarm when the battery “wears out” > and needs to be replaced — it’s been beeping every 8-9 minutes for the past > few months. I’m not really interested in consuming another battery for no > real reason (I don’t need backup because if the power is out at my house I > have no need for internet access). That said, I’m thinking of a > non-destructive way to trick the charger/alarm circuit into thinking it has > a fully-charged, new & happy 12V battery. > > I don’t know much about lead-acid charger circuits but I suspect some > sort of current-limited voltage-regulated supply that alarms when the > battery no longer holds 11V or some other specified threshold. > > Would a simple 12V zener diode work, or would a charge circuit just dump > a wasteful amount of current into the diode? Perhaps a 13V zener so that no > current even flows? I have easy access to the battery terminals, and medium > access to the rest of the circuit. > > I’m ok with mangling the alarm itself, but I’d prefer a nice > “plug-n-play” solution since I know at least three friends in a similar > situation who aren’t as destructive. > > -Andy > > > > -- > Andrew M.C. Dawes > Associate Professor of Physics > Pacific University > amcdawes.com > > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');> > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber > > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');> > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber > > > -- > Andrew M.C. Dawes > Associate Professor of Physics > Pacific University > amcdawes.com > >
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