Trying to use windows powercfg command prompt.

C:\Windows\system32powercfg /batteryreport
gets
Invalid Parameters -- try "/?" for help

C:\Windows\system32/powercfg /batteryreport
gets
'/powercfg' is not recognized as an internal or external command,
blah blah . . .

Used to have a pretty comprehensive battery monitor on this
machine.
Would read serial number, mfr, cycle count, original capacity,
present capacity and dynamic charge/ discharge numbers.
Disappeared somehow. Nothing in Acer downloads, currently.

Any suggestions?

RL