Hello. It is likely that the PERC H710 controller firmware is out of date. Try applying firmware update and see whether OpenManage will continue to report the same battery status. Select appropriate OS and SAS RAID from this link: www.dell.com/.../drivers
The OpenManage log reports "The PERC1 battery is low.", the 10-60 minutes later it reports "The PERC1 battery is operating normally." Is it time to get a new battery?
PE R320 PERC H710 mini battery issue