Multi-cell Li-ion Battery Protection Solution Multi-cell Li-ion Battery Protection Solution September 2008 Seiko Instruments Inc. PP TmPL001 Agenda Multi cell Li-ion Battery Application and protection circuit idea S-8204 Introduction Multi cell Li-ion Battery protection circuit solution with S-8204 Conclusion 2 Seiko Instruments Inc. Confidential Li-ion Battery Application and Protection IC 1-cell pack 2-cell pack 3-cell pack 4-cell pack (3.6 V average) (7.2 V average) (10.8 V average) (14.4 V average) Mobile phone PHS VCR MD DVC iPod DSC ……