[ltp] T4x Battery Conditons Survey

[Lubos Kolouch]

>On Sat, 17 Dec 2005 13:58:55 +0000
>"Peter B. West" <lists@pbw.id.au> wrote:
> Eric Van Buggenhaut wrote:
> > On Fri, Dec 16, 2005 at 03:53:03PM +0800, Kelvin KAN wrote:
> > 
> >>Now nearly 1 yr, in 38 charging cycles, the battery capacity of my
> >>T42 has dropped from 4700mAh (designed) to 4200mAh (fully
> >>charged). Projecting this degradation into next yr, it will be
> >>practically giving me only 2-hr running by next X'mas.
> >>
> >>To be honest, I've been using the battery with great care and have 
> >>removed the battery while running on AC.  And 38 charge cycles in 1
> >>yr does NOT seem too frequent.
> >>
> >>How's yours?  Really an IBM (not Lenovo) quality issue?
> > 
> > 
> > Same problem here. When I bought my T42 they claimed the battery to 
> > stand 5h. I never went beyond 3h (which is normal: 47000mAh/16000mW
> > = ~3).
> > 
> > After one year of intensive use (200 charges) always emptying the 
> > battery before charging, I get a max. capacity of 42000mAh just
> > like you. I'm kind of disappointed by this aspect of the Thinkpads, 
> > probably the only weak point of this laptop.
> 
> This sounds like great battery performance to me.  If this is typical
> of ThinkPad batteries, we have nothing to complain about.  Try a Dell
> sometime.
> 
> > Now, you should have a 1-year warranty, including the battery, just 
> > like I have (mine ends tomorrow hehe). One month ago, I called IBM 
> > customer service, I complained that the battery discharged really
> > too quickly and they sent me a new battery without problem. Bonus:
> > you keep the old battery if you want.
> > 
> > You might give it a try..
> > 
> > 
Hello,

Just for info :

X31, 2 years of use :

design capacity:         47520 mWh
last full capacity:      29460 mWh

Lubos