What app did you use to see this information??
I'm sorry I'm not contributing to helping you with your issue, I just am really curious. All the things I have seen like this you have to jailbreak for which is not an option for me.
i used ibackupbot the other day for the very first time . its a free program for windows and mac that gives you battery health, without jailbreaking
i don't know what app the OP used
as far as batteries go, i think apple recommends you consider replacing the battery once capacity is less then 80%, but ultimately its up to you if you feel that its worth the $79 us dollars it costs to get a new battery.
if its still under warranty / applecare and your battery has less then 80% then you can get a new battery from apple for free.
i dont trust that app, charge it to 100 % and get a second opinion from the genius bar