Service Battery warning?


i bought refurbished macbook pro 2010 ebay. works fine, seems when click on charging icon says "service battery" when on low battery. if happen charge it, message goes normal. when charged not see message until goes below level around 50%. have 400 cycles in laptop, should dont have worry about?

edit: looked @ battery health, @ 77%
 

you don't have worry that. worst happen battery may die prematurely around 20% or less. or may continue work without problem.
 


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