1-22 Getting StartedBattery DisposalBefore disposing of the main battery, put adhesive tape onthe terminals. The main battery is made of either NickelMetal-Hydride (NiMH) or Lithium Ion (Li-Ion).Contact your local waste management officials for infor-mation regarding environmentally sound collection, recy-cling, and disposal of batteries.INTERNAL BATTERIESYour nickel metal-hydride or lithium Ion battery is the mainpower source in your NEC Versa 2600 computer.Appendix B lists NiMH and Li-Ion battery specifications.In addition to this battery, the CMOS battery and bridgebattery provide power for system backup.CMOS BatteryThis battery provides battery backup and prevents data lossin the system’s complementary metal oxide semiconductor(CMOS) RAM. This memory area contains information onthe system’s configuration, for example date, time, drives,and memory. The CMOS battery lasts approximately twoyears.Only an authorized NEC service technician can replace theCMOS battery.Bridge BatteryThe bridge battery provides power to the NEC Versa 2600when main battery power is very low (and the system isabout to shut down), and during the time a spent main bat-tery is removed and replaced. The bridge battery gives youtime to Save your unsaved data, close your open programs, andshut down the system.