On a T400 with both rear and ultrabay batteries, this latter is recognized by the ACPI system but will not be used : unplugging the rear battery switches off the laptop.
The ultrabay battery is used only when the T400 is booted with no rear one.
On a T400 with both rear and ultrabay batteries, this latter is recognized by the ACPI system but will not be used : unplugging the rear battery switches off the laptop.
The ultrabay battery is used only when the T400 is booted with no rear one.
On a T400 with both rear and ultrabay batteries, this latter is recognized by the ACPI system but will not be used : unplugging the rear battery switches off the laptop.
The ultrabay battery is used only when the T400 is booted with no rear one.
Confirmed the switching off part.