Is it a good decision to put windows on macbook pro retina? will it harm to its battery life?

Windows. like the Mac OS, will drain the battery but it will be about that same as running Mac OS. Thus, it will not harm the battery any more than runing Mac OS.

Try asking in the Boot Camp and MacBook Pro forum.

Windows does not have as good Temperature Control as Mac OS X. It also does not use the battery as carefully.

If you expect to be doing a lot of Processor-intensive or Graphics-intensive processing, there is a small risk causing heat damage. As long as you are aware of those issues and keep an eye on the heat generated, you should be fine.

Ekss wrote:

Is it a good decision to put windows on macbook pro retina? will it harm to its battery life?

You might also consider installing Windows 7 as a Virtual Machine within VMware fusion, Parallels, or VirtualBox. That way, the Mac OS will stay in control of low level processes such as temperature control, as well as running both OS's at the same time.

Yes but game performance will be degraded.

It depends upon the game. I notice a significant slowdown just running Win 8.1 or Win 10 in Parallels.