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Lion compatible battery for IBM Lenovo Y450 Y450A Y450G Y550 Y550A Y550P series laptops
Ratings : Li-Ion, 10.8v / 11.1V, 4000mah
Compatible battery part numbers (P/Ns) :
55Y2054 L08L6D13 L08O6D13 L08S6D13
Please check above battery part number (P/N) from the label of existing battery. If your laptop's battery part number is not listed here, please ask me through "ask seller a question" link and I will help you decide which battery is suitable for your laptop.