05-14-2011 07:25 AM
As a field-computer I use an old Omnibook XE2 equipped with a 15GB hard disk, 256Mb ram, Windows XP and a new 4000 ma/h Li ion battery . Machine works perfectly (if somwhat slowly) except for the following: When remaining battery charge level falls below 96% on the taskbar monitor, the machine will not boot from the battery. If reboot is attempted In this circumstance, the machine switches off with a barely audible click very early (a few seconds from switch-on) in the POST boot phase. This occurs even if power management is disabled in the Bios. At all times machine boots perfectly from the AC charging unit. I know the battery to be new and sound - If mains power is disconnected immediately after post, the machin will work off the battery for hours. Anybody got any ideas ?
02-06-2012 04:22 AM
The battery not give enough start current and voltage. The notebook use for start cc 2500 mA current in boot.If the battery voltage decreased in boot 12.5V then a machine stop. After start the current level cc 1000mA.