New Battery Issue

My 3.5 year old MacBook original battery caacity was rapidly diminishing over the past 3-4 months. Was only getting about an 1 3/4 hours max. And it would shut off randomly at 15-20 minutes remaining. I purchased a replacement and after installing, it shows battery health at 82%, and 4616mAh maximum charge. The time remaining also fluctuates very wildly. Will this improve to normal 5600mAh after calibration?
Message was edited by: Ron R

Ron--
Can't be for sure, but I'd be back down to wherever you got that battery and getting a new one as an exchange. That shouldn't be happening on a new battery.
Best of luck--
Doc

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