Specifications: Brand: Unbranded /OEM Voltage: 11v is compatible with 10.8v Capacity: 4400 mAH Compatible part numbers PA3399U-1BAS, PA3399U-1BRS, PA3400U-1BAS, PA3399U-2BRS, PA3399U-2BAS, PA3399U-2BRS, PA3400U-1BRL, PA3400U-1BRS, PA3478U-1BAS, PA3478U-1BRS, PABASO57, PABASO76, PABASO77 Compatible Models. Toshiba Equium A100-027 , A100-147 , A100-306 , A100-337 , A100-338 , M50-164 , M50-216 Toshiba Satellite A100 series A100-151 , A100-153 , A100-163 , A100-165 , A100-169 , A100-18 , A100-188 , A100-212 , A100-225 , M100 Series M100-ST5000 Series , M100-ST5111 , M100-ST5211 , M105-S3000 Series , M105-S3001 , M105-S3002 , M45 Series (except M45-S165 M45-S165x M45-S169 & M45-S169x) M50 Series (except, M50-MX2) M50-04N01N ,M50-0TG01D , M50-0TJ01E , M50-0YU01N , M50-105 , M50-109 , M50-122 , M50-130 , M55 Series (except, M55-S139 & M55-S139X) M55-S325, M55-S3251, M55-S329, M55-S3291, M55-S331, M55-S3311 Pro A100 Pro M50 Toshiba Tecra Series A4-SP211 A3-100, A3-103, A3-106, A3-114, A3-141, A3-143, A3-180, A3-181, A3-188, A3 Series, A3-SP611, A4-108, A4-109, A4-158, A4-161, A4-164, A4-171, A4-196, A4-212, A4-244, A4-257, A4-S312TD, A4-S313, A4 A5-122, A5-138, A5-155, A5-S116, A5-S416, A5-S516, A5-S6215TD, A5 Series A6 Series A6-104, A6-EZ6311, A6-EZ6312, A6-S513, A6-ST3112, A6-ST3512, A6-ST6315, A7-S612, A7-S712, A7, A7-ST5112, S2-107, S2-128, S2-131, S2-155, S2-159, S2-175, S2 Series VX/670LS A100-599 , A100-233 , M45-S331 What's in the box 1x Laptop Battery