macbook pro battery health issue


i have mid2012 macbook pro 15" battery health keeps changing randomly: 33%, 37%, 75%, 85%, 82%, 37%.
have reseted pram , smc many times issue still there.
started having issue when downgraded yosemite mavericks. so, thought mavericks problem reverted yosemite battery still behaving weird.
hope can me fix it. thx in advance
 

the battery bit on young side flaking out, can happen. i'd diagnosed @ apple store.
 


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