Need help to reset/calibrate SUA1500 with all battery charge lights blinking

[Anonymous user]

SmartUPS Model: SUA1500   Serial #: AS0345132330

After replacing the battery the Battery Charge lights all flash. The battery actually provides over an hour of runtime  with about a 35% load.

The battery seems to be reporting a reasonable looking percentage, but the "time left" is always zero.  I have tried self tests and full charge/discharge cycles with no change.  It looks like I need to reset a "battery constant" but everything tells me that I have to askAPC  for help in how to do that. One website says  "The good news is that if you are located in the USA, all you have to do is contact APC Technical Support and they will send you a serial port dongle which plugs into the serial port of your UPS and reprograms the battery constant value for you to the correct value." Is that true?

I have a USB  cable (no serial) and Mac and Linux machines (no Windows). The software I have been using to query the battery is call apcupsd  (from http://apcupsd.org). I'd very much appreciate any instructions/help to get this thing reset properly.

Plugged into the battery is a Linux (Ubuntu) machine, iMac  and MacBook  Air.

apcupsd software reports the following information:

APC : 001,044,1091
DATE : 2015-01-13 13:39:09 -0800
HOSTNAME : AirHead-2.local
VERSION : 3.14.12 (29 March 2014) darwin
UPSNAME : SmartUPS1500
CABLE : USB Cable
DRIVER : USB UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2015-01-09 19:55:18 -0800
MODEL : Smart-UPS 1500
STATUS : SHUTTING DOWN
LINEV : 120.2 Volts
LOADPCT : 21.4 Percent
BCHARGE : 100.0 Percent
TIMELEFT : 0.0 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME : 0 Seconds
OUTPUTV : 120.2 Volts
SENSE : Medium
DWAKE : -1 Seconds
DSHUTD : 630 Seconds
LOTRANS : 106.0 Volts
HITRANS : 127.0 Volts
RETPCT : 30.0 Percent
ITEMP : 27.9 C
ALARMDEL : No alarm
BATTV : 27.5 Volts
LINEFREQ : 60.0 Hz
LASTXFER : No transfers since turnon
NUMXFERS : 1
XONBATT : 2015-01-13 08:30:08 -0800
TONBATT : 0 Seconds
CUMONBATT: 84 Seconds
XOFFBATT : 2015-01-13 08:31:32 -0800
SELFTEST : NO
STESTI : 7 days
STATFLAG : 0x05200248
MANDATE : 2003-11-07
SERIALNO : AS0345132330
BATTDATE : 2014-05-12
NOMOUTV : 120 Volts
NOMBATTV : 24.0 Volts
FIRMWARE : 601.3.D USB FW:1.5
END APC : 2015-01-13 13:39:40 -0800