T43p - Mouse pointer freezes after changing the battery to a new one

[Slider]

Hello,

I have bought a new battery for my IBM Thinkpad T43p. In the description of the new battery I have seen that this battery is compatible with T43 series. Battery details are: DC 10.8V 5200mAh/56Wh. Replace: 08K8214.

My problem is:

I have ordered a new battery for my Thinkpad T43p but when I turned off  the notebook and replace the old battery with the new one the notebook became strange. I use Windows XP Prof on this computer and when the login screen appeared and during I was typing my user name and password the mouse pointer was freezed and I had to turn off the computer. It was happened within approx 1 minute after the Login screen appeared. The symptom was the same with or without plugged in AC charger. I have tried several times and the same behavior was happened. When I changed back the old battery the computer became normal again without any freezing. The fan was working properly in both cases. The symptom is the same if I change the battery during AC charging and using Windows. 

I don't have an idea about the reason of it. Can you help me with ideas?

Thanks in advance,

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[Slider]

Hi again,

and one strange thing.... if I don't touch the computer at the Login screen then it does not freeze! The screensaver turns on after 5 minutes but the computer does not freeze!  It was freezed only when I started to move mouse pointer fast....

[ajkula66 Guru]

Pull the battery out and run the machine on AC only. Does it freeze now?

If it doesn't, the "new" battery needs to be replaced.

Good luck.

[Slider]

Thank you for the answer!

I have pulled out the battery and run with AC power only and then it was working properly! I have asked the seller about this and they answered that I should ask the local Lenovo support because they have not heard about any similar problem before!

But I am getting sure I should re-send the battery and request a change because I assume that this problem is somehow related to the circuit of the new battery!

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[leblabac2172]

I have just experienced the exact same problem - replaced the battery with a T43 compatible and the mouse froze, etc. When I put the old battery back in, it worked just fine.