Dell Alienware 15 R2 (P42F002) CMOS Battery Removal and Installation
⋆ RTC CMOS Battery for Dell Alienware x51
KM92T Fit for DELL Alienware X51 R1 System Motherboard 1717 cm DDR3 H61 Lga 1155 Motherboard Original Desktop Mini Itx 0KM92T KM92gaming Motherboard Combo : Amazon.co.uk: Electronics & Photo