07-25-2012 09:17 AM - last edited on 07-25-2012 10:35 AM by andyP
I recently purchased a new genuine lenovo 47++ battery (P/N: 43R9255, Manufactured 05/03/2012) for my X201 laptop running Windows 7 Professional. I've had this battery installed for about a month and a half and the lenovo power manager software is already telling me that the battery is in "poor" condition, and is only holding 65% of its charge capacity. I've always had it set to maximize battery lifespan and have been letting it run down to the battery warning after every full charge. I discovered this because of a decrease in battery time and sporadic hibernation problems.
Is this a bad battery?
P.S. I tried to run the "battery gauge reset" and followed all program instructions, but the program never ran. I left it on all night (while plugged in and set to the "timers off" power setting) and the "perform reset" button text changed to "stop battery reset," but it never appeared to run through the actual reset protocol.
Moderator Note; s/n edited for member's own protection
07-25-2012 09:20 AM
Also, the first time I used the battery, I did fully charge it, and then use it on a no-timers power plan until it went into forced hibernation, so it really seems wrong that I've already lost 35% of the battery capacity...
07-25-2012 09:27 AM
This certainly sounds like a defective battery. Sometimes one of more cells can become defective. When this happens it's common to see the battery charge drop suddenly in a large increment, e.g. from 99% to 66%. Contact Lenovo customer support, explain what you've explained here and they should replace your battery.
07-27-2012 02:13 PM
Have you recalibrated the new battery? You do this in ThinkVantage Power Manager.
You can download it here if you don't have it installed:
11-15-2013 09:33 AM
I have a thinkpad T430 S. I preferred installing xp sp3
The battery gauge seems to have a different behaviour if compared with other experiences of mine
after 6-8 months from the pc was bought, it appeared shutting down too early if compared with the duration estimated by the gauge and displayed
Indeed this behaviour may be understood, and the battery re-calibrated, but not so early, in my experience
Indeed it was after 6-8 months, not possible to have a hybernation of sleeping planned -say- at 10% remaining of the battery duration, as the 10% could not be reached as the pc stopped far before
Thus I performed maintenance of the battery as explained in an other discussion where I posted this note without any answer by now
The battery maintenance was performed -of course, as you can imagine- at night. The following morning I found the thinkpad switched off and no message appeared when turning it on.
The situation, in any case, didn't change at all: the pc uses to switch off when the gauge says 2 hours remaining and, interesting, as soon as I connect it to the power, it start saying to be incredibly already charged at 70% !
May I have some idea about this case ?
- battery firmware or sw not suited for XP ?
- battery with some cell broken ?
- how to have more information about the gauge calibration (maintenance) without waiting hours in front of the pc
Bye and thanks