Battery life is point of comparison in Windows 8.1 vs Windows 7 battle, when you don’t have nearby power supply. With the improvement of hardware like CPU, Graphics card, Ethernet cards etc, you should see improved laptop standby time on battery.

On October 25, 2012 Microsoft released the stable version of Windows 8, releasing the RTMs,  Consumer Preview (CP) builds earlier.  A year later, October 17th 2013 Windows 8.1  was released as part of the NT family of OS.  People who bought Win 8 were given free upgrade to this version. Three years earlier on October 22, 2009, general availability of Windows 7 took place.

Many customers of Microsoft released their tablets based on Windows 8. But wait a minute? Are you curious to know the speed benchmarks in the Windows 8 vs Windows 7 performance battle? See this infographic and get an answer!

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Windows 8.1 vs Windows 7 Battery Life Performance

On forums, a user tested the battery life of Windows 7 vs Windows 8.1 on his Samsung laptop model NP900X3C.

The typical configuration looked like this.

Processor Support  Intel Core i5 Processor 3317U (1.7GHz, 3MB L3 Cache)
Chipset  Intel
RAM Size 4 GB
           Type DDR3 (1600 MHz)
           Slots 1

Screen 13.3″ SuperBright 400nit HD+ LED Display (1,600 x 900), Anti-Reflective
Graphics Controller Intel HD Graphics 4000

Sound Controller High Definition Audio
Speakers 3 W Stereo Speaker (1.5 W x 2)

Windows 8.1 lasted 30 minutes longer than Windows 7. The following were some of the settings used.
Brightness = 2/3
Wi-Fi & Bluetooth = Disabled
Email Client used = Refresh interval of 10 minutes

Also Windows 7 is more likely to consume more power than 8 and 8.1. This is because of extra power management features of the later. But a ThinkPad is said to give only half-life of 4 hours instead of the advertised 8 hours on 8.1.

In another test by a YouTube user (, a different test scenario was used. The results were little different from the above.

In the maximum, minimum and browsing case, there was not much difference in battery life between Windows 7 and 8.1.

But when the laptop was tested running a movie, Windows 7 lasted 1 hour 6 minutes more.

In a PCWorld test, Windows 7 lasted 5 hours and 7 minutes compared to Windows 8.1, whose battery life ended in 4 hours and 41 minutes. This is a difference of approximately 25 minutes.

Windows 8.1 vs Windows 7 Battery Life – Contradicting Results ??

Tha main reason could be the difference in drivers which can improve or decrease battery performance. If you are using a Wi-Fi radio’s default driver set to maximum, it could impact the battery life. The same holds true with PC using Wi-Fi signal.

Poorly tuned third-party applications can also have a say in the battery drain of Windows 8.1. Brightness of the laptop is a crucial factor in this regard.

In a battery life test, conducted by AnandTech, there was a comparison of Idle battery life, heavy browsing and H.264 video. In the idle test and heavy web browsing (using different IE browsers) Windows 7 lasted longer than Windows 8 CP (Consumer Preview).

But using a i7-2820QM processor and Windows 8 CP with a H.264 video produced better battery life than Win 7. But when an i5 was used to do the benchmark test, Windows 7 was slightly better.

Windows 8 vs Windows 7 – Battery Life

Earlier in Feb, 2012. end, “ITWorld” came up with a review on Windows 8 Consumer Preview battery life performance. It tested variety of laptops and compared Windows 7 SP1 & Windows 8 CP in terms of power consumption. For the test they used the following 3 hardware devices.

Laptop A — Acer Aspire 7551G. A Run of the mill 17-inch laptop with a Phenom II X4 CPU and 4 GB of RAM. Good for multimedia, but not particularly well-suited in the battery life department.

Lapotp B — Samsung NC 10. One of the better 2008-era netbooks. The usual yada-yada specs (Atom N270 1.6 GHz, 1 GB RAM). Low performance, extremely good battery life.

Laptop C — 13″ MacBook Air (2011) equipped with a 1.8 GHz Core i7, 4 GB of RAM and a 256 GB SSD drive.

The results were impressive from Windows 8 point of view when measured with the PCMark 7’s “Lightweight” test.

The idle battery life of Windows 8 CP increased by 51 minutes when compared with Windows 7 SP1 on Laptop C i.e MacBook Air 13”. This was the maximum gain out of the 3 laptops. The other two laptops i.e Laptop A and B gained 19 minutes and 40 minutes respectively. The busy battery performance life measured using PCMark 7 workload feature, significantly reduced compared to idle life. While in Laptop A, the increase was negligible. The other two laptops i.e Laptop B & C showed an increase of 19 minutes and 24 minutes respectively.

Case Study from Microsoft Forum

According to this article on, one user complains of battery drain in Windows 8 RTM. He basically uses Windows 8 Enterprise RTM on a HP Elitebook 8440p notebook. But later he found out that, the resource hog was not Windows 8 but was because of his CPU.

After a capture with Intel BLA, the main problem seems to be the CPU (Intel i7 vpro), that keeps running  too long in c1 state, even when using powersave power plan.

You can use sophisticated laptop optimization utility like Battery Optimizer to get battery life in Windows 8. This little program is freeware now.

According to “TomsGuide” the significant improvement in Windows 8 is its battery life compared to Windows 7 without reduction in performance.  The battery life was tested in normal use, with a mix of editing documents, reading Web pages, playing games, editing photos and streaming videos in desktop mode. The test didn’t use Metro apps in order to a proper comparison with Windows 7.

The Windows 8 vs Windows 7 performance contest shows that Microsoft has made significant improvements to make Windows 8 more eco-friendly. The tests on most websites indicate the above statement. Though only time will tell of the deficiencies that may come up, when Windows 8 is released into the market.

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  1. Karen Tucker says:

    Amazing! Its genuinely amazing post, I have got much clear idea on the topic of from this post..

  2. To compare Windows 8 and Windows 10 is a daunting task. Though both of these have different graphic interfaces, they are some similarities in both of them. The Metro interface was introduced in 8 and it continues in 10 also. But Win 10 is more robust, fast, and provides performance benefits. Thanks for the info.

  3. Nauj Solrac says:

    Very good comparison now im installing win8, im waiting to win10 to come out. 🙂