Wireless rear speakers in 5.1 to 7.1 systems any good?

[barney]

Looking to get either a 5.1 or 7.1 surround system but really need wireless rear speakers. Are these any good? I assume they arent run from mains power so is the battery life any good?

Next question is what is a good system? ideally cheaper is better budget of around £150 and really need to have floor stands for the rear speakers.

Last question is if i have the rear speakers at different distances (one about 2 ft further back then the other) can you adjust them to make up for it?

Sorry for stupid questions but never looked at surround sound systems before and i really need to upgrade for the 2.1 system that i have had for the last 6 years

 

[Kainz]

Can't help you with your question, but should state that a friend of mine has the 'wireless' logitech top end speakers. Each rear speaker requires a powerpoint :/

 

[barney]

Ok that does help as it was actually the logitech ones i was looking at.