Intel E6400 Technology Guide - Page 81

Latitude E6500, E6400 Reviewer's Guide Battery LED Charge and Health Gauge Latitude batteries have an LED gauge on the bottom of the battery that provides information on charge and health status of the battery at the touch of a button. The battery charge gauge will display immediately at the touch of the button.. 100% - 80% charge is remaining 79 - 75% charge is remaining 74 - 70% charge is remaining 69 - 65% charge is remaining 64 - 60% charge is remaining 59% or less charge is remaining The battery health status will display after holding the battery check button down for more than 3 seconds. The health gauge display will illuminate after the charge gauge reports the batteries current remaining charge. 100% - 80% charge performance is remaining 79 - 75% charge performance is remaining 74 - 70% charge performance is remaining 69 - 65% charge performance is remaining 64 - 60% charge performance is remaining 59% or less charge performance is remaining Note: Battery pack shall be operational at charge performance less than 59%. Five flashing LEDs displayed indicate a permanent failure of the battery. *See important information at end of document 81