I have had my Scala Q2 since June, and use them year round with Florida weather.
There was only one post mentioning they had battery charging issues, and that was during a test period where they would try, and evaluate, and they might be guessing that the non-replaceable (?) battery would get worse over time.
How would they know results if they only borrowed a pair to test for a very short test, then returned them?
I agree with response from webbikeworld that the poster probably had a defective battery.
(I also don't know what the poster meant by needing to yell to activate. A slight cough is all it takes, or just do it manually).
In fact, the complete opposite battery life here.
What started off as maybe 6-7 hours, is now close to 10 hours of nearly constant open intercom channel (normally turn off VOX and just leave channel always open for talking).
The batteries seemed to condition themselves over time, and have only got better.
Sometimes I run them down all the way.
Other times I recharge after a couple hours use.
Never babied them.
Looking at others comments and a common thing does pop up.
You MUST get the speakers exactly right in your helmet, otherwise you will get very poor results.
I'm talking 1/2" off can mean double the audio sound that you will hear!
I have now used these in several helmets, and when properly positioned, you can talk and hear fine at highway speeds. On one ST1300, I did find that windshield up during phone calls helped a lot, and when up, we could do 85 MPH and still talk fine.
Also, when properly setup, FM does work great (for mono), and is one of the reasons to get a Q2.
No, you can not pair to another pair. You can only use them as 1, 2 or 2 1/2 (I'll call it when a 3rd unit is tied in). The 3rd unit and 2nd unit can not talk to each other, they can only talk to unit 1, which is why I stated 2 1/2.