On 6/14/26 14:28, Jeffrey Walton wrote:
On Sun, Jun 14, 2026 at 12:42 PM Eben King <[email protected]> wrote:
On 6/14/26 10:07, John Hasler wrote:
Before you replace it open it up and reseat and retighten all the
connections (especially the battery terminals).
Did that. I disconnected them all, checked the battery voltages (13.4
and something else reasonable), and checked the 60A fuse between them.
It's a weird fault, that it goes instantly from completely normal to bad.
I don't think it goes from normal to bad.
There's a small tick like a relay flipping, and on the display the bar
graph that indicates battery charge goes from full to empty with a
flashing inverse X by it. That looks bad. Occasionally it goes back to
having batteries the same way, but not often.
Maybe reset the battery health or calibration that estimates health?
Use something like upsrw from <https://networkupstools.org/>. Or
search for "ups reset battery calibration linux".
upsrw(1) says I need
<ups> UPS identifier - <upsname>[@<hostname>[:<port>]]
How do I know what my UPS name is?
