Check Liebert GXT4

This is simple bash script to check Emerson Liebert GXT4 with Emerson SIC UF snmp 810. It can check ups status (status != 0 means critical, i can't find docs about statuses), check current load, check battery remaining time and battery capacity in percent.
Usage: ./check_ups.sh -h hostname -C snmp community -x check type -w warning -c critical
Note that the warning and critical options should be use like 8000 for 80%, because of snmp output.
Check types:
upsstatus
upsload
upsbatperc
upsbatmins
P.S. I added warning exit code for 0% load of ups, because it probably means that battery is broken and ups is on bypass mode.
P.P.S. This is my first script, so please bear with my meager skills.