Model: Ideapad G4070
Link (specs included): http://globalbrand.com.bd/Lenovo-IdeaPad-G4070-Core-i5-Graphics-2GB?search=g4070
Should I go for it? I'm mainly looking for a lightweight and a one that will last at least 4-5 hours as I'm a student and I can't recharge it all the time.
It's a better laptop with enough specs. You can go with it.
It is one of several laptops on the market that is trying to fool you.
The i5-4200U has Intel HD 4400 built in.
They put in an R5 M230 graphics card that activates when plugged in on AC power.
The R5 M230 is only 23% stronger than the HD 4400
http://www.game-debate.com/...400-mobile
In other words, in a gaming situation, instead of 20 frames per second, you get 25. It is hardly noticeable.
They cut the RAM to 1x4GB, and removed Windows, so it isn't even functional when you buy it.
For speed
http://www.cpubenchmark.net/...u_list.php
Core i5-4200U @ 1.60GHz 3298
i3-4010U @ 1.70GHz 2483
Pentium 2020M @ 2.40GHz 2314
Core i3-4000M @ 2.40GHz 3308
The Intel site and CPU World show CPU wattage.
http://www.cpu-world.com/CPUs/Core_i5/Intel-Core%20i5-4200U%20Mobile%20processor.html
Thermal design of 15 watts.
To understand battery life, you need to know how many watt hours or amp hours a battery has.
Sometimes a battery is removeable from the outside, and sometimes it is inside the computer.
If a battery is removeable, you can buy a spare battery.
The Lenovo you found shows a 6-cell battery so is probably removeable and should be a good battery life.
It is hard to know what the best system is without checking every one.
The Lenovo looks OK and screen brightness set low increases battery life, but it is hard to know how long any battery will run for.
Very hard to shop in Bangladesh. The laptop looks OK, but it seems expensive for what you get.
You can go with it.