7Caution:When replacing the battery, use only IBM Part Number 36L9077 or an equivalent type battery recommended by themanufacturer. If your system has a module containing a lithium battery, replace it only with the same module type made bythe same manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of.Do not: Throw or immerse into water Heat to more than 100°C (212°F) Repair or disassembleDispose of the battery as required by local ordinances or regulations.Caution:When a CD-ROM drive is installed, note the following.Use of controls or adjustments or performance of procedures other than those specified herein might result inhazardous radiation exposure.Removing the covers of the CD-ROM drive could result in exposure to hazardous laser radiation. There are noserviceable parts inside the CD-ROM drive. Do not remove the CD-ROM drive covers.D ANGERSome CD-ROM drives contain an embedded Class 3A or Class 3B laserdiode. Note the following.Laser radiation when open. Do not stare into the beam, do not viewdirectly with optical instruments, and avoid direct exposure to the beam.≥≥≥≥32 Kg ≥≥≥≥55Kg(70.5 (121.2lbs) lbs)Caution:Use safe lifting practices when lifting your machine.Caution:Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury orequipment damage, disconnect the attached power cords, telecommunications systems, networks, and modemsbefore you open the covers, unless instructed otherwise in the installation and configuration procedures.