Thinkpads Forum

Hi to all,

Just bought a new bay battery for my X301,but i have a little problem !!

Both battery can be seen in the power manager program, as well as their charge state,same are in good condition.
6 cell main battery - 39 cycle
3 cell bay battery - new - 1 cycle

The problem is that once the bay battery is drained the system goes immediate shutdown rather than using the primary battery.

if I dont remove the drained secondary battery, or plug the AC power, even the primary battery is 100%, my laptop cant boot.

I try with both Win7Pro and Win8.1 , all drivers up to date from lenovo site - in both cases the problem persist in same mod !!

Have someone here experience the same problem ?

nobody? any advice?

So, to be clear, what happens when you try to:

-Boot using AC power, no main battery, no bay battery
-Boot using AC, main, no bay
-Boot using AC, no main, bay
-Boot using AC, main, bay

-Boot using main battery, no bay
-Boot using main battery, bay

-Boot using bay battery, no main

It's hard to gather exactly what your problem is from the description you have.

Q-Ball

-Boot using AC power, no main battery, no bay battery - boot was successful,everything works normal
-Boot using AC, main, no bay - boot was successful,everything works normal (using main battery)
-Boot using AC, no main, bay - boot was successful,everything works normal (using ultrabay battery)
-Boot using AC, main, bay- boot was successful,everything works normal (using both battery with AC)
-Boot using main battery, no bay - boot was successful,everything works normal (no AC, using only main battery)
-Boot using main battery, bay - boot was successful,everything works normal (no AC , using both battery )
-Boot using bay battery, no main - boot was successful,everything works normal (no AC, using only ultrabay battery)

In every scenario everythink works ok, no problem !
BUT that is not my problem..i try to explain

On my thinkpad x301 i have 2 batteries :

-first is main battery (6 cell)
-second is ultrabay battery (3 cell)


In an normal scenario , first is discharging ultrabay battery then automatically switch to main battery !
My problem is that after the ultrabay battery is drain the system goes immediate shutdown rather than automatically swich and use the primary battery.
this is my problem ::>> Every time my laptop shut down rather than use the main battery whichis fully charged !!
After the laptop shut down i cannot boot until i remove the ultrabay battery or plug in the AC ... which is really weird!!

I mention that in PowerManager program both batteries are seen and managed correctly, the total time shown are the time read from both battery , dunno why when the ultrabay batery is drained rather than use the main battery which is fully charched the laptop shut down !!!

2 things:

-Make sure you're running the latest BIOS and Power Manager versions and update them if you aren't
-Post this to the Lenovo.com and the notebookreview.com forums so more eyes will see it: I think there was a suggestion to downgrade the BIOS to an earlier version and then upgrade to the newest one in some threads but I don't know if that's actually applicable here.

Just out of curiosity, what happens (no AC, laptop's running, main battery's in) if you physically eject the secondary battery from the bay?

Q-Ball wrote:2 things:

-Make sure you're running the latest BIOS and Power Manager versions and update them if you aren't
-Post this to the Lenovo.com and the notebookreview.com forums so more eyes will see it: I think there was a suggestion to downgrade the BIOS to an earlier version and then upgrade to the newest one in some threads but I don't know if that's actually applicable here.

Just out of curiosity, what happens (no AC, laptop's running, main battery's in) if you physically eject the secondary battery from the bay?

i already have the latest BIOS and the latest power manager / power manager driver

no AC - laptop running, main battery in - i eject the baybattery and the laptop shut down (

xplayz wrote:Hi to all,

Just bought a new bay battery for my X301,but i have a little problem !!

Both battery can be seen in the power manager program, as well as their charge state,same are in good condition.
6 cell main battery - 39 cycle
3 cell bay battery - new - 1 cycle

The problem is that once the bay battery is drained the system goes immediate shutdown rather than using the primary battery.

if I dont remove the drained secondary battery, or plug the AC power, even the primary battery is 100%, my laptop cant boot.

I try with both Win7Pro and Win8.1 , all drivers up to date from lenovo site - in both cases the problem persist in same mod !!

Have someone here experience the same problem ?

Yes, I have what appears to be the exact same problem. With both batteries fitted, the machine can read the state of both but it drains only the secondary one. When that runs flat, the machine dies.

I've tested this using two different X301s, two primary batteries and two secondary batteries - both machines do it. And these aren't Windows either - one's running Ubuntu 14.04, the other 15.04.

Did you find a fix??