On 2025-04-15 13:30, Liz Tuddenham wrote:
...
However, it is usually a good enough indicator for obvious cases of
dying batteries that collapse after a few tens of seconds or boil-up
under heavy load.
That's the case, the battery went down fast. The UPS software had the
time to send me an alert email, but the event did not get written to
disk logs. The battery would make 2 years in service next august.
Hi,
I bought yesterday a battery for my UPS at a shop that specializes in batteries. I had my old battery there, so to get the same type, and I
asked the chap if he had a voltage meter. Something like that, he said.
He brought out a special meter with huge clamps, attached it, and said
the batter had 13.6 volts. Then he tested "load" and said said the
battery gave out only 20 out of 100. I don't know what he was actually measuring, some time of current over a resistor measurement, I suppose.
It is adjusted for the size of battery.
Do you know what meter could be that thing?
However, it is usually a good enough indicator for obvious cases of
dying batteries that collapse after a few tens of seconds or boil-up
under heavy load.
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2025-04-15 13:30, Liz Tuddenham wrote:
...
However, it is usually a good enough indicator for obvious cases of
dying batteries that collapse after a few tens of seconds or boil-up
under heavy load.
That's the case, the battery went down fast. The UPS software had the
time to send me an alert email, but the event did not get written to
disk logs. The battery would make 2 years in service next august.
I would have expected a much better lifetime than that, Does the
charging system follow the battery manufacturer's guidelines?
Continuous trickle charge can ruin a battery that isn't designed for it,
some batteries thrive on an occasional discharge and re-charge.
Battery technology is extremely complex. There are so many ways of
killing a battery; 'good practice' consists of juggling them to give the
best compromise.
Carlos E.R. <robin_listas@es.invalid> wrote:
On 2025-04-15 13:30, Liz Tuddenham wrote:
...
However, it is usually a good enough indicator for obvious cases of
dying batteries that collapse after a few tens of seconds or boil-up
under heavy load.
That's the case, the battery went down fast. The UPS software had the
time to send me an alert email, but the event did not get written to
disk logs. The battery would make 2 years in service next august.
I would have expected a much better lifetime than that, Does the
charging system follow the battery manufacturer's guidelines?
Continuous trickle charge can ruin a battery that isn't designed for it,
some batteries thrive on an occasional discharge and re-charge.
Battery technology is extremely complex. There are so many ways of
killing a battery; 'good practice' consists of juggling them to give the
best compromise.
Hi,
I bought yesterday a battery for my UPS at a shop that specializes in batteries. I had my old battery there, so to get the same type, and I
asked the chap if he had a voltage meter. Something like that, he said.
He brought out a special meter with huge clamps, attached it, and said
the batter had 13.6 volts. Then he tested "load" and said said the
battery gave out only 20 out of 100. I don't know what he was actually measuring, some time of current over a resistor measurement, I suppose.
It is adjusted for the size of battery.
Do you know what meter could be that thing?
--
Cheers, Carlos.
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