V7's high-quality replacement notebook batteries are made from the highest-quality cells available & incorporate all of the standard logic boards, thermal protectors, thermistors & circuit breakers to ensure maximum levels of safety, reliability & efficiency. V7's wide selection is compatible with top-line products from all major manufacturers & meets or exceeds original OEM specifications to provide longer-lasting quality & no memory effect. Features Technology: Li-Ion, Voltage: 11.1V, Capacity: 4500m Ah, Cells: 6 Cell Compatible with: ASPIRE 4310 ASPIRE 4310G ASPIRE 4315 ASPIRE 4320 ASPIRE 4320G ASPIRE 4520 ASPIRE 4520G ASPIRE 4710 ASPIRE 4710G ASPIRE 4710Z ASPIRE 4710ZG ASPIRE 4715 ASPIRE 4715Z ASPIRE 4720 ASPIRE 4720G ASPIRE 4720Z ASPIRE 4920 ASPIRE 4920G