630m lasts longer than 700m??? WHY?

I saw some people saying that 630/140 lasts for 6-7 on extended battery while the ultra small and portable 710/700 only lasts for 5.5 hours. Why is this so? its a matter of size and battery cell ratio?

If on dim settings, can the 710/700 last longer than 5.5 hours?

What is the total weight of 140 and 710 with extended batteries?

 

For one thing, the batteries are different on the two systems. The 630m has a 9 cell battery, so it gets more life where the 710/700 has a 8 cell.

There are several factors. Thinigs like wireless on or off, brightness, video cards, etc. could explain the difference. Another thing is dell has software called Quickset that has power pofiles on it. If you are using the battery maximize profile on the 630m and the performance profile on the 700m, then you'll get a difference.

The best thing to do if you want the most battery life is to use Dell's quickset and use the battery performance. If you aren't going to be using wireless, then turn it off, and of course turn down the brightness.

SG

 

Im guessing both have those right? Im sure that a controlled test will result in both being the same. maybe the poster had basic configs.

 

Just curious. do they have a hard button for wireless or a software button

 

A hard button as in a button you press to activate the wireless? If thats what you mean, they both have a hard button and a software button. You can activate Wi-Fi / Bluetooth by hitting "Fn" then "F2".

This is just a guess, but perhaps the cells on the 630m / XPS M140 battery are bigger then the 8 cell on the 700/710m. Or they don't have to be bigger but, they hold more. Over the years, rechargeable batteries hold more. For example I remember like 5-10 years ago. The AA Ni-cad batteries were rated at 500maH. Now the Ni-Hm batteries I have seen go up to 2600maH. That means that the newer batteries hold like 5 times as much as the older ones. Each year the maH on rechargeable batteries go up. And they hold more power without getting bigger.

The 700m came out a long time ago. Perhaps dell is still using the same older batteries in the 710m's also. The lower capacity cells with lower maH. And because the 630m / XPS M140 came out not too long ago, the cells in those batteries hold more, and are of higher maH.

 

yes MAH will make a lot of difference. Im hoping dell will come out witrh a higher one. the amount of MAH doesnt really add to the weight. I believe theys hould prioritize the "road warrior's" laptop in the battery section.