battery(?) problem


i've been having problem macbook, although i'm not sure if it's battery, or laptop itself. i'd been starting low battery performance, 2-3 hours on full charge, little more if turn brightness down pretty way. went out , brought brand new battery, charged it, , i'm still getting around 3 hours of battery life on full charge. i'm wondering if should take laptop mac store , have them @ it, or there else can fix "problem".
 

try recalibrating batter , see if helps.
 


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