New battery in Back-UPS 500. Status ONLINE LOWBATT

[a11an]

Would anyone be able to offer some advice.

I have replaced the battery in my old Back-UPS CS 500.  New battery has been in for a week now and it still shows as LOWBATT.  The voltage is 13.6v, shows as 100% charged with a run time of 0m.  I have run apctest and done calibration and updated the battery date.  apcaccess returns below.  Please help! thanks.

APC : 001,045,1057
DATE : 2024-08-28 11:02:32 +0100
HOSTNAME : house
VERSION : 3.14.14 (31 May 2016) debian
UPSNAME : house
CABLE : USB Cable
DRIVER : USB UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2024-08-28 11:01:29 +0100
MODEL : Back-UPS CS 500
STATUS : ONLINE LOWBATT
LINEV : 244.0 Volts
LOADPCT : 12.0 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 0.0 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 230.0 Volts
SENSE : Medium
DWAKE : 0 Seconds
DSHUTD : 0 Seconds
LOTRANS : 180.0 Volts
HITRANS : 266.0 Volts
RETPCT : 0.0 Percent
ITEMP : 29.2 C
ALARMDEL : 30 Seconds
BATTV : 13.6 Volts
LINEFREQ : 50.0 Hz
LASTXFER : Automatic or explicit self test
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : OK
STESTI : None
STATFLAG : 0x05000048
MANDATE : 2004-01-09
SERIALNO : BB0402032086
BATTDATE : 2009-02-21
NOMOUTV : 230 Volts
NOMINV : 230 Volts
NOMBATTV : 12.0 Volts
NOMPOWER : 300 Watts
FIRMWARE : 808.q3.I USB FW:q3
END APC : 2024-08-28 11:03:06 +0100

[Teken]

Why does the battery date indicate 2009?!? What does the APC Power Chute software say when connected?!?

[a11an]

Thank you that was the issue.  I'm using linux and had already updated the date via apctest.  But I entered the wrong date format, was MM/DD/YYYY not DD/MM/YYYY I was expecting.

I have now updated the date and the calibration ran correctly.  I now have a full battery with 50m runtime at 10% load.  Thank you.

[Teken]

Great to hear and appreciate the quick feedback. If the previous reply by me helped to resolve the issue please do mark it as so.

So this information may help the next person asking the same. 👍