Normally Laptop Batteries Have Slide Locks That Hold Them In. Take A Look At The Bottom Of Your Laptop.
'''''Please Note Image Is Not The Same Model As Yours - For Part Identification Purpose Of Battery Removal Tabs'''''
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There Should Be Sliders Like The Ones Shown In The Picture.
Once You Slide Those To The Unlocked Position The Battery Should Come Out After.
Upon Getting An Actual Picture Of Your Laptop. I Can Further Assist You