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9 Posts

05-20-2011

Poland

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  • Message 11 of 42

Re: X220 battery lifetime

2011-05-28, 12:29 PM

I have like 6h+ battery life on average, when browsing web with full brigthness. So im really satisfied with it.

X220i (TN and i3 version), standard 5200 RPM HDD. Fresh OS install.

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15 Posts

06-13-2011

United States

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  • Message 12 of 42

Re: X220 battery lifetime

2011-06-13, 6:37 AM
A bit off-topic, thanks for the 'powercfg -energy' tip! Didn't know it existed.
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987 Posts

06-03-2011

United States of America

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  • Message 13 of 42

Re: X220 battery lifetime

2011-06-14, 4:41 AM
Are you using more ram than the review? The review was only of a system with 1 stick of RAM. Each additional stick uses more power, that could account for some of the additional power draw. You should also compare the SSD's power draw to the HDD. The SSD might actually draw more power.
X1 Carbon 3rd Gen Type 20BT i7-5500U, 2560x1440 (non-touch), Win 10 Pro, 8GB RAM, 512 SSD, Intel 7625 WiFi, BT 4.0 | ThinkVision P24q-10 monitor

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15 Posts

07-13-2011

United States of America

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  • Message 14 of 42

Re: X220 battery lifetime

2011-07-23, 15:06 PM

I've had the X61s for 4 years and I am planning on upgrading to a X220, but uncertain which processor to go with.  i3, i5, or i7. 

 

Battery is VERY important, but would love the faster processor if it doesn't make much difference with battery runtime.  Any recommendations?

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78 Posts

02-03-2010

New York City

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  • Message 15 of 42

Re: X220 battery lifetime

2011-07-23, 16:49 PM

>>I am planning on upgrading to a X220, but uncertain which processor to go with.  i3, i5, or i7.  Battery is VERY important, but would love the faster processor if it doesn't make much difference with battery runtime.  Any recommendations?<<

 

I'm no expert in this (in fact, I'd love to hear from one),  but the i3 2310, i5 2510 and i7 2620 all seem to draw  a max of 35W, so I'm guessing that the less powerful chip won't provide any power savings. In fact, I'm wondering if the more powerful one might even be slightly better, as it won't have to work as hard. Any thoughts out there about this from someone who knows more than I do? Here's the link to the power-draw stats: https://secure.wikimedia.org/wikipedia/en/wiki/Intel_Core#Sandy_Bridge_microarchitecture_based



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987 Posts

06-03-2011

United States of America

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  • Message 16 of 42

Re: X220 battery lifetime

2011-07-24, 20:03 PM

There probably isn't going to be much of a battery life difference between the i3, i5, and i7. There is little performance difference between the i5-2520M and the i7-2620M. The i3 takes a performance hit because it does not have Turboboost. I would just get the slice battery in addition to the 9-cell or two 9 cells batteries when you order.

 

Part of it depends on what you are doing on battery. Intel's general strategy is the "hurry up and get it done" philosophy. The idea is to clock up as high as possible, get work done and then go back to a low clock. Intel feels that this gives the best battery life. To take advantage of this, you'll probably want at least the i5 2520M because of Turboboost. Additionally, components make a difference. An extra stick of ram draws more power. In general, HDDs draw more power than SSDs. Some SSDs draw more power than others. Leaving things like Bluetooth on accidentally draws power. The fingerprint reader is a power draw. If you get the i-7 and USB 3.0, the USB 3 chip will draw more power. You get the picture, every extra thing you add draws a little extra power. In addition, some chips just draw a little more power than others and you don't know what you'll get.

 

If you are using the machine to use the internet, not visiting websites that use flash, or just typing, I'd get the i3. Anything else, I'd go for the i5. I would only buy the i7 if you need USB 3.0. If price is an issue, and the difference is between the i3 and an SSD or an i5 and a normal HHD -- go for the i3 + SSD.

 

 

 

X1 Carbon 3rd Gen Type 20BT i7-5500U, 2560x1440 (non-touch), Win 10 Pro, 8GB RAM, 512 SSD, Intel 7625 WiFi, BT 4.0 | ThinkVision P24q-10 monitor

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5884 Posts

11-24-2007

United States of America

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  • Message 17 of 42

Re: X220 battery lifetime

2011-05-05, 18:57 PM

ThinkStation P700      ThinkPad X1C7

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15 Posts

07-13-2011

United States of America

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  • Message 18 of 42

Re: X220 battery lifetime

2011-07-24, 21:40 PM
Thanks Nibs & Punch Card. I appreciate the recommendations. I think I'm going to get an i5 (to take advantage of the turbo boost) and ensure I only get 1 RAM stick. Thanks again guys!
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5 Posts

08-05-2011

United States of America

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  • Message 19 of 42

Re: X220 battery lifetime

2011-08-14, 1:31 AM

The problem here is that the battery life for the X220 is not only claimed to be so great by Lenovo, but by independent reviews. Both nbr.com and laptopmag.com indicated battery life far beyond what the OP is realizing, and he/she's not the only one. I have a similar setup, with the i7, SSD, 6-cell battery, and 2x4GB RAM. Granted, the RAM will use a tiny bit more energy, but that's a very, very small amount, and it should be more than made up for between fewer hard drive accesses and the SSD having lower power consumption than the HDD. Furthermore, the i7 shouldn't use any more power, since it's rated the same, as another person has already mentioned, and in fact should therefore use less, since it will complete tasks quicker. I don't doubt the USB 3 controller uses more, but it shouldn't be that much of a difference, especially when the port is not active (i.e. nothing is plugged in).

 

If you do the math, with the 6-cell battery having a capacity of ~60Wh, to achieve 7 hours of runtime (nbr got just under 9 and laptopmag just under 8) it needs to average 8.57W. I disabled all startup items except the Lenovo ones and the Adobe and Java updaters which mostly do nothing, and the LOWEST I've seen it hit has been 8.48W. It's gone to 20-25+ and is usually between around 9-12W. Bear in mind this is with the screen brightness at 33% and typing this into an already loaded webpage, whereas the tests involved continuous web surfing/webpage loading and nbr had the screen at 70% brightness. If I actually try to do any real work on my X220, such as switching back and forth between working on a word document and internet browsing, my battery life drops way down.

 

I didn't take note of the wattage numbers, but when I was testing it with BOTH my 6-cell and the battery slice, which is essentially another 6-cell in terms of Wh, it was fairly consistently telling me that I was getting between about 10-11 hours total runtime. This is barely more with both batteries than review sites were getting with one, and with more strenuous settings. I then played a few games of Risk II, NOT a demanding game by any means, and based on the amount of time it took to drop from where it was when I started to 5%, I would probably only get about 4 hours if I had been doing this the whole time. Keep in mind, this is with BOTH the 6-cell and the external slice battery, and with the backlight at 5/15. Something is very much not right here. I'm interested in what others' wattage numbers are like.

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193 Posts

10-12-2008

Seattle, US

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  • Message 20 of 42

Re: X220 battery lifetime

2011-08-14, 14:31 PM
Just for reference, I get 11hrs battery life in a Engadget like movie test, with my X220 (i7, 4G+4G, 7200rpm 320G + 80G mSATA SSD, 9cell, Win7 x64).

Normal daily usage battery life would be around 7hrs without Chrome, and 6 with Chrome. All test are done with proper monitor brightness, varying from 5 to 12. My daily work environment including a WinXP in VM and several Visual Studio processes.

I am extremely satisfied with X220 battery life.

But it is a solid truth that SOFTWARE YOU USE INFLUENCE THE BATTERY LIFE VERY MUCH. I think anyone who is not satisfied with the battery life would most likely to be:
1. Using a bad virus protection softwares that drains battery or having malware/adware running on background.
2. Have no idea how laptops before X220 generation are performing with their battery.
3. Using the "Maximum Performance" power scheme and surfing Internet with IE.
No offence, that is the conclusion from my daily observation. I do job about software engineering so I usually observe such things much.
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