UPS Premier 5-year Warranty: Provides an enhanced 5-year warranty, including a guaranteed battery replacement, on the following models: E3000RTXL2U(NC), EXR2000RT2U(NC), EXR3000RT2U(NC), EXR3000RTHV(NC), EC1500RT2U(NC), EC2000LCD(-NC), EC3000LCD(-NC), EC2000RT2U(NC), EC3000RT2U(NC), BP48XL, BP72XL, BP36CRTXL, BP72CRTXL, BP24RTXL, BP48RTXL