ThinkPad T440p - Checking the Coin-Cell Battery

Tocheckwhetherthebatterychargesproperlyduringoperation,dothefollowing:
1.Dischargethebatteryuntiltheremainedbatterypowerislessthan50%.
2.Connectthecomputertoacpowertochargethebattery.IfthebatterystatusiconintheWindows
notificationareaindicatesthatthebatteryisnotcharging,removethebatteryandletitreturntoroom
temperature.
3.Reinstallthebattery.Ifthebatteryisstillnotcharging,replacethebatterypack.
4.Checkthebatterystatusiconagain.Ifthesameerrorstillexists,replacethesystemboard.
Checkingthecoin-cellbattery
Tocheckthecoin-cellbattery,dothefollowing:
1.Removethecoin-cellbattery.See“1080Coin-cellbattery”onpage65.
2.Measurethevoltageofthecoin-cellbattery.Seethefollowingillustration.
Wire
Voltage(Vdc)
Red+2.5to+3.2
Black
Ground
•Ifthevoltageiscorrect,replacethesystemboard.
•Ifthevoltageisnotcorrect,replacethecoin-cellbattery.
•Ifthecoin-cellbatterydischargesquicklyafterreplacement,replacethesystemboard.
28HardwareMaintenanceManual