Dell Power Edge R710 PERC 6/E Controler Battery Degraded

Hi 

I can see this  Battery Degraded warning message in Dell Open Manage against  PERC 6/E Controller. Do we need to change this battery immediately or there is no harm to keep like this? Appreciate any one can explain about it and i want to know this battery contains any configuration or settings saved. 

Dell MD1000 Direct Attached storage is connected through this PERC 6/E controller.

Thanks