from console.
cnaabcd1::> system node environment sensors show -name "Bat Present"|"Bat Volt"
Node Sensor State Value/Units Crit-Low Warn-Low Warn-Hi Crit-Hi
---- --------------------- ------ ----------- -------- -------- ------- -------
cnaabcd-01
Bat Present normal
PRESENT
Bat Volt normal
8100 mV 5500 5600 8500 8600
cnaabcd-02
Bat Present normal
PRESENT
Bat Volt normal
8100 mV 5500 5600 8500 8600
4 entries were displayed.
from SP mode :
system battery show.