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  • self-charging backup battery

    From vjp2.at@at.BioStrategist.dot.dot.co@21:1/5 to All on Fri Feb 24 14:08:02 2023
    I have a 1980 device (HP2621a terminal) with a now discontinued battery which retained settings while off. I am wondering if there isn't ome sort of continuously recharging (when on) battery that could replace this?

    Also, for fiber optic telephonebackup as, thanks to Murphy's Law, the
    batteries are never functional when there is an actual power outage.



    --
    Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm
    ---{Nothing herein constitutes advice. Everything fully disclaimed.}---

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  • From Dan Purgert@21:1/5 to vjp2.at@at.BioStrategist.dot.dot.co on Fri Feb 24 14:51:23 2023
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    On 2023-02-24, vjp2.at@at.BioStrategist.dot.dot.com wrote:

    I have a 1980 device (HP2621a terminal) with a now discontinued
    battery which retained settings while off. I am wondering if there
    isn't ome sort of continuously recharging (when on) battery that could replace this?

    I'd hazard it's not an impossible task to add that in place of the
    original primary cell battery; space might be a concern though.


    Also, for fiber optic telephonebackup as, thanks to Murphy's Law, the batteries are never functional when there is an actual power outage.

    Test the UPS on the same cycle as you test your smoke detectors.
    Replace batteries as needed.


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    |_|O|_|
    |_|_|O| Github: https://github.com/dpurgert
    |O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

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  • From vjp2.at@at.BioStrategist.dot.dot.co@21:1/5 to All on Tue Feb 28 20:01:22 2023
    Walmart actually sells 12v rechargeable batteries for Verizon Fios.
    Can I both use and charge the battery? I've done such things, just trying it, and suspect it would.


    --
    Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm
    ---{Nothing herein constitutes advice. Everything fully disclaimed.}---

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dan Purgert@21:1/5 to vjp2.at@at.BioStrategist.dot.dot.co on Wed Mar 1 10:26:29 2023
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    On 2023-02-28, vjp2.at@at.BioStrategist.dot.dot.com wrote:
    Walmart actually sells 12v rechargeable batteries for Verizon Fios.
    Can I both use and charge the battery? I've done such things, just
    trying it, and suspect it would.

    Usually no. That is, if the charge controller detects you've connected
    the charger, the battery gets charged and the device is powered from the charger connection.


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    |_|O|_|
    |_|_|O| Github: https://github.com/dpurgert
    |O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

    --- SoupGate-Win32 v1.05
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  • From vjp2.at@at.BioStrategist.dot.dot.co@21:1/5 to All on Tue Mar 7 22:00:32 2023
    It seems what I am really seeking is a simplified UPS??

    --
    Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm
    ---{Nothing herein constitutes advice. Everything fully disclaimed.}---

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jeff Liebermann@21:1/5 to vjp2.at@at.BioStrategist.dot.dot.co on Tue Mar 7 18:23:12 2023
    On Fri, 24 Feb 2023 14:08:02 -0000 (UTC),
    vjp2.at@at.BioStrategist.dot.dot.com wrote:

    I have a 1980 device (HP2621a terminal) with a now discontinued battery which >retained settings while off. I am wondering if there isn't ome sort of >continuously recharging (when on) battery that could replace this?

    You would need to add a charging circuit to make that work. If you
    just want to get it working:
    1. Kindly disclose the discontinued battery voltage and part number.
    2. Install a lithium (not Li-Ion) battery as used in some smoke
    alarms. Select the number of cells in series to be slightly more than
    the rated voltage of the discontinued battery. Button cells, such as
    CR2032 will work, but will not last as long as larger cells.
    3. Install whatever number of series silicon diodes are necessary to
    reduce the battery voltage down to what makes the terminal happy.
    About 0.6V per cell.
    4. Find a place to mount the battery pack inside the terminal.

    Also, for fiber optic telephonebackup as, thanks to Murphy's Law, the >batteries are never functional when there is an actual power outage.

    --
    Jeff Liebermann jeffl@cruzio.com
    PO Box 272 http://www.LearnByDestroying.com
    Ben Lomond CA 95005-0272
    Skype: JeffLiebermann AE6KS 831-336-2558

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