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20 Posts

01-20-2008

Poland

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T61 battery lifetime - how to elongate it

2008-05-08, 17:13 PM
Hi, we have a lot of T61.
Unfortunately he lifetime is very short. (just only 2-2,5h if the notebooks are new, after few weeks just 1,5-2 h).
(every settings are on the minimum).
 
Is sombody know any tricks how to improve the lifetime?
Regards
Pawel
 
 
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9380 Posts

11-27-2007

Slovakia

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Re: T61 battery lifetime - how to elongate it

2008-05-08, 19:44 PM
It would be helpfull to know which T61s you have, depending on model type and battery type things will be different.

Andy  

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20 Posts

01-20-2008

Poland

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Re: T61 battery lifetime - how to elongate it

2008-05-08, 20:20 PM
Notebook T61 Type 8890-CTO / ID 8890W5N
Battery standard.
 
Pawel
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9380 Posts

11-27-2007

Slovakia

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Re: T61 battery lifetime - how to elongate it

2008-05-08, 20:26 PM
That means;
 
Product: ThinkPad T61 8890-W5N
Operating system: All

Original description: Based on 8890-CTO: T7100(1.8GHz), 1GB RAM, 80GB 5400rpm HD, 14.1in 1024x768 LCD, 128MB nVIDIA Quadro NVS 140M, CDRW/DVDRW, Intel 802.11agn wireless, Bluetooth, Modem, 1Gb Ethernet, UltraNav, Secure chip, Fingerprint reader, 6c Li-Ion, WinVista Business

Andy  

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136 Posts

12-07-2007

Bay Area, CA

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Re: T61 battery lifetime - how to elongate it

2008-05-08, 21:42 PM
You can get 6 hours at maximum settings if you replace the standard battery with the 9 cell battery with the additional ultrabay battery.
T61_Wide | Model No. 7662 - CTO
Core 2 Duo T7250 | 2GB OCZ DDR2-800
82566MM Gigabit | 4965AGN Centrino Pro
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20 Posts

01-20-2008

Poland

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Re: T61 battery lifetime - how to elongate it

2008-05-09, 17:15 PM
Thank you - that is right.
 
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20 Posts

01-20-2008

Poland

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  • Message 7 of 13

Re: T61 battery lifetime - how to elongate it

2008-05-09, 17:16 PM
I mean Andy - that is right. But I put additional 2GB of memory.
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276 Posts

02-04-2008

Canada

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Re: T61 battery lifetime - how to elongate it

2008-05-09, 17:24 PM
Hello Pawel,

I use a program (freeware) called RMClock to throttle the CPU (make it run at half/quarter speed or use the full power on demand) in order to reduce the power consumption by the CPU. It works well and allows for longer battery life.

I wrote a short "how-to" for RMClock found --> here

Hope that helps

Steve
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136 Posts

12-07-2007

Bay Area, CA

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Re: T61 battery lifetime - how to elongate it

2008-05-10, 4:24 AM
1GB of RAM or 2GB of RAM will consume the same amount of power.  The power consumption of RAM is measured per stick of RAM, not per megabyte.  So if you have 2GB or 1GB, it will be the same as long as you have 2 sticks of RAM (2x512MB or 2x1GB).
T61_Wide | Model No. 7662 - CTO
Core 2 Duo T7250 | 2GB OCZ DDR2-800
82566MM Gigabit | 4965AGN Centrino Pro
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29 Posts

04-24-2008

Germany

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  • Message 10 of 13

Re: T61 battery lifetime - how to elongate it

2008-05-13, 18:33 PM
Hi, I do have installed rmclock too, and I'm quite happy, as it's CPU controll is much better as any lenovo delivered tool.
 
But still I do not get any good battery time. I do have installed the big battery and the ultrabay battery. but doing just a little bit of work (not really heavily numbercrunching) my battery is emtpy after 1.5h. And recharging takes forever. If both batteries are empty, and I have the T61 in the docking station (with performance on demand setting) it takes a whole business day to get the batteries refilled.
 
I would be interested in some power numbers. with my current settings: minimum Display light,  Bluetooth and WLAN  deactivated, Super LFM mode (1.2GHz)  the minimum used Power is just below 20W. (currently 24W, but I do not really know why). My Processor is a T73002GHz.
Changing the display from min to max does change the power from 21 tro 26W. so around 5W for the Display light.
BTW: this is the only reason why I do have this big green monitor icon in my taksbar: it can display the current Energy taken from the batteries.  unfortionally i have not found a way to log the information and get a nice average, but just by looking you get a feeling what is going on with the electrons in the battery pack.
 
So if somebody can share some numbers  this would be interesting to compare.
 
I checked a little bit on the rmclock options, but so far I have no idea what the throttling really helps (at least on my power numbers it does not change anything, and I could not enable the IDA mode (basically I have never seen, that the two cores are clocked differently ...)
 
 
BTW: my exact system is a: 6458-E35    
 
 
 
Regards
 
hermann
 
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