[Nut-upsuser] output of upsc

[James]

  Why is battery.mfr.date not a date?
Why is there no device.serial?
Are they both errors on CyberPower's part?

$ /usr/local/ups/bin/upsc CP550SLG at localhostbattery.charge: 100
battery.charge.low: 10
battery.charge.warning: 20
battery.mfr.date: CPS
battery.runtime: 960
battery.runtime.low: 300
battery.type: PbAcid
battery.voltage: 4.9
battery.voltage.nominal: 12
device.mfr: CPS
device.model: CP550HG
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.version: 2.4.3
driver.version.data: CyberPower HID 0.3
driver.version.internal: 0.34
input.transfer.high: 0
input.transfer.low: 0
input.voltage: 121.0
input.voltage.nominal: 120
output.voltage: 120.0
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 30
ups.load: 46
ups.mfr: CPS
ups.model: CP550HG
ups.productid: 0501
ups.realpower.nominal: 330
ups.status: OL
ups.test.result: No test initiated
ups.timer.shutdown: -60
ups.timer.start: 0
ups.vendorid: 0764