rechargeable batteries are only guaranteed for 1 year. So I'm not sure what you are expecting. Real ones are much more expensive than knock offs. [URL]   Replacements are easily found 3rd party. dell Part #  70K80 7VJMH T40JJ [URL]   [IMAGE]REAL ONES Are not cheap [IMAGE]The ones from dell are more expensive than 3rd party
I ordered a battery directly from Dell for my PERC P710P controller card.  I ordered this battery on Aug 15, 2019.  The battery has been working fine when I installed it after receiving it.  Recently, my battery is showing a status of being removed in MegaRAID.  Now when I power on my workstation, I am seeing a message about the battery not being connected and press D to disable the battery. I am a little surprised that the battery is only lasting one year and two months.  How long do these batteries last exactly?  I only paid less than $16 for it, but I thought it would last longer than one year...  
PERC P710P Battery Question