I have never done this (probably because it sounds like a bad idea and I haven't had the issue as frequently as you are), but you could try replacing a RAID battery
on a test server while it is on. Slide it out, take the cover off, disconnect the bad battery, and connect the good, then back in the rack...If all goes well, you have a new battery replacement process that doesn't involve downtime. —
August 44 secs ago