<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div> I've been using nut on an APC Back-UPS 750 for several years with no problem, seeing the walled "UPS on battery power"</div><div>messages during short 1-2 minute outages. This is connected with the original USB cable that came with the unit.</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">After replacing the battery recently, nut always triggers a shutdown when AC power is cut off, even if only for 1 minute.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style:
normal;">I see that the data fields reported by nut have not changed (details below) and the runtime is stuck at 0, even with 35% charge. This runtime is an incorrect</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">reading as I verified that stopping nut and cutting off AC power does indeed keep my computer running. It is only nut that thinks the runtime is 0 and triggers</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">the shutdown.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">FAQs #37, #38 on
networkupstools.org are related to this issue:</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;"> <br> http://www.networkupstools.org/docs/FAQ.html#_i_replaced_the_battery_in_my_apc_smart_ups_and_now_it_thinks_the_battery_is_low_all_the_time_how_do_you_fix_this</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;"><br>I followed this procedure (charging the battery fully, letting it drain off a token load while UPS is grounded on a surge protector) but it did not help.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman";
background-color: transparent; font-style: normal;">Perhaps I missed something running this procedure; if anyone has suggestions for solving this they'd be greatly appreciated.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">I'm using nut-2.6.4-1 on debian linux (testing distribution, kernel 3.1.0-1).</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">thanks,</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">--jack</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman";
background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">Here are the details I see:</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: "Times New Roman"; background-color: transparent; font-style: normal;">=> upsc apc<br>battery.charge: 35<br>battery.charge.low: 10<br>battery.charge.warning: 50<br>battery.date: 2001/09/25<br>battery.mfr.date: 2008/01/25 <<<<<<<<<< battery bought 11/01/2012 ??<br>battery.runtime: 0 <<<<<<<<<< runtime = 0 with 35% charge above?<br>battery.runtime.low:
120<br>battery.type: PbAc<br>battery.voltage: 11.8<br>battery.voltage.nominal: 12.0<br>device.mfr: American Power Conversion<br>device.model: Back-UPS ES 750<br>device.serial: 3B0804X42777 <br>device.type: ups<br>driver.name: usbhid-ups<br>driver.parameter.pollfreq: 30<br>driver.parameter.pollinterval: 2<br>driver.parameter.port: auto<br>driver.version: 2.6.4<br>driver.version.data: APC HID 0.95<br>driver.version.internal: 0.37<br>input.sensitivity: medium<br>input.transfer.high: 139<br>input.transfer.low: 92<br>input.voltage: 119.0<br>input.voltage.nominal: 120<br>ups.beeper.status: enabled<br>ups.delay.shutdown: 20<br>ups.firmware: 841.I2 .D<br>ups.firmware.aux: I2 <br>ups.load: 42<br>ups.mfr: American Power Conversion<br>ups.mfr.date: 2008/01/25<br>ups.model: Back-UPS ES 750<br>ups.productid: 0002<br>ups.realpower.nominal: 450<br>ups.serial: 3B0804X42777 <br>ups.status: OL CHRG LB
<<<<<<<<<<<<<<< see FAQ #37, 38<br>ups.test.result: No test initiated<br>ups.timer.reboot: 0<br>ups.timer.shutdown: -1<br>ups.vendorid: 051d<br></div></div></body></html>