Powerware ups statistics

[Maxim Budimirov]

Hi all!
After installing Powerware 9140, i connect this device via serial cable 
to FreeBSD machine
and use NUT (/usr/ports/sysutils/nut) to monitor it.
So, the output of upsc is

ambient.temperature: 24
battery.charge: 78
battery.runtime: 2289
driver.name: bcmxcp
driver.parameter.pollinterval: 2
driver.parameter.port: /dev/cuad0
driver.version: 2.2.1
driver.version.internal: 0.13
input.frequency: 50.0
input.voltage: 229.6
output.current:  8.7
output.frequency: 49.9
output.phases: 1
output.voltage: 221.4
output.voltage.nominal: 220
ups.firmware: Cont:01.00 Inve:01.00
ups.model: Powerware 9140   10000VA
ups.power.nominal: 10000
ups.serial: SA201A0013
ups.status: OL
ups.temperature: 49

I cant find some of descriptions of ups statuses...

What is the:
battery.runtime (???)
output.current  (current in amperes???)
ups.status: OL  (OL is - online? other available statuses?)

Thanks .

--------
Maxim Budimirov