Battery estimated time..?

[goji]

Hello, i (almost always) hused my W520 on power but i just wanted to try it with battery now to see its performance.

I read the reviews @notebookcheck and they rate the 9cell for running ~6h while web surfing. I get ~3h...

My 9cells are nearly mint (3-8 cycles only), CPU's running at its lowest are & no consuming apps running..?!

[brchan]

Make sure to change your power plan settings to balanced, and have NVIDIA optimus to enabled to prevent the discrete gpu from draining a lot of power.

Also, what does the lenovo battery management application say about your battery? It should tell you how many cycles and what % of charge the battery can hold compared to its design capacity. Batteries that sit at 100% for extended periods of time, such as when the laptop is plugged in, can lose capacity relatively quickly even though they have low cycle counts.

[ZaZ]

My 9cells are nearly mint (3-8 cycles only), CPU's running at its lowest are & no consuming apps running..?!

The biggest battery drainer on any notebook is the screen, so if you're running yours at full brightness, that will drain the battery more quickly.

[goji]

It's not full, it's like 10/15. Of course i made sure i was using optimus. Low CPU too as said, and these batteries are new.

[goji]

I realise now that i was using discrete graphics and that's why i got sh*** battery life! I did a battery calibration & end up with 84Wh avalaible (instead of 93Wh initially). Notebookcheck (same unit) report 6h wifi & 10h IDLE.

After turning to integrated, it seems i get about ~4h30 with light browsing. Even though battery lost ~10Wh, i should get more than that, don't you think? Only thing that use CPU little is windows sidebar, killing it = not much changes.

The worse is their report for IDLE use (lowest power mode, no wireless connections: 10hours!!) : i do not get more than in light browsing mode (~5h)!! Any idea what could cause this? I keep thinking but no clues so far..