Hi, Unfortunately, I do not see a way to bypass the messages and to continue to boot.   Let us know if you have any additional questions.
The batteries on both controllers in my PS4210 have failed. I will order replacements, but in the meantime are there any early-boot serial terminal commands or environment variables (the ctrl-P interface) I can use to boot regardless? Some sort of bypass for the controller's battery health checks? My understanding is the battery is only used to perform write-back in the event that both power sources fail simultaneously. My PS4210 has its power supplies on two different PDUs on two different phases, with UPS, so that's a very low likelihood risk. It's much more important to me that I can run the unit in the meantime than keep it off until the replacement batteries arrive in a few days. Thanks!
Bypass Equallogic PS4210 battery end of life check