Specifications: 6 Cell, Li-ion battery, Rated at 11.1V(10.8V Compatible) 5200mAh Compatible Models: 6 Cell 5200mah Battery for Acer Aspire 4551 4741 5741G AS10D51 AS10D31 AS10D3E All Futurebatt Products are CE-/RoHS Certified and Built-in circuit protection ensure both safety and stability; Strict guidelines for compatibility, and standards compliance for environmental safety 100% Brand New from Manufacturer; Rechargeable Up to 600 times over life of battery; Equipped with Higher Quality Cells yet has Same Size & Shape as an OEM Battery Please contact us with any questions or concerns - we are here to help. (Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed in the Product Description Details)