As you've now got the VIB installed and can see the storage device under "configuration", you should also be able to see "battery".
If it doesn't, you probably don't have one.
The lack of a BBWC would certainly exacerbate the problem, but with or without it, I feel you're asking for a technical solution to a problem caused by the purchase of under specced hardware.
When you say "we deployed"... I'm assuming this isn't a new server?
A G6 is two generations back and there's definitely something wrong if you feel you just bought this hardware.