Hi, i am starting to be desperate, therefore i registered myself here. Let me explain my story.
My computer is now almost 2 years old and I have less than 14 days till the warranty expires (I am from Europe), but I'd like to avaid this, because i really need my computer now, not after 30 days, which is by law designated time till which it must be returned to me back. I did not have to use my computer outside home for about 3 month, so I was using that during that period as desktop computer, where i set in lenovo power manager, that all energy should be taken from the AC adaptor letting the battery to deplete itself in its own pace. But i have taken my computer to the libraries lately and i have experienced sudden battery problems. Let me describe them in order as it happened.
1) battery shows that that it has more than lets say 20% of power, but windows power manager warns me that battery capacity is in reality 6% and i need to use my AC adaptor now. after second even lenovo power manager recognize the fact that battery is almost depleted. first i did not pay attention, i thought it was some temporary bug and it will not be repeated again.
2) unfortunatelly it was, therefore i updated lenovo power manager to current version (6.11), which realized that current battery capacity was not 54Wh (as before update), but 47Wh. Therefore I resetted battery gauge statting that battery capacity is now slightly over 51Wh. For couple of days everything was as it should (probably, because i always connected AC adaptor around 10% of remaining battery).
3) now my problem appeared again, though battery depleted naturally and slowly to 10%, after that windows power manager popped again showing, that battery is 6% and I need to use my AC adaptor. after connecting to electricity whole W7 froze for a while. I rather restarted system after which I realized, that battery info is wrong again - original capacity of battery since i have this laptop was over 62Wh, now is slightly over 57Wh (this is something new i have not realized this 2 days ago, when i was doing the reset, and I'd bet i happened just now) and current battery capacity rose back to 54Wh (as I said before, after the last reset it was just 51Wh).
I attemted to do Battery test through Toolbox, but system refuse to run this test (even after resterting system) stating "Cannot run".
For a while i thought i have this problem which requires updating battery firmware: http://support.lenovo.com/en_US/diagnose-and-fix/detail.page?DocID=HT003431
but FRU number of my laptop is 42T4813 and is not in the list of batteries requireing update.
Sorry for long text, and quality of English (I am not native speaker), any help is welcome. Thank you in advance.
PS: i always install updates throught System update, my BIOS should be therefore up to date, i also Lenovo Power manager does not offer any update for battery firmware.
