I've gotten some news from my early adopter friends that the 30K battery life may not be up to the specs listed on the SENA website: 8 hours of mesh intercom and 13 hours of BT intercom. Since I have a brandy new dual pack sitting here I thought I'd do a bit of controlled bench testing on them. I've been riding with them but just using them for music and phone, no intercom and no long rides. I have two helmets each set up with a SENA 30K with the speakers installed in the helmet. I also have a set of Sensaphonic ear phones that I will test to see if driving audio to those uses more or less battery than driving the SENA speakers. I put a full overnight charge on both of my units; set them up on helmets spaced about 40' apart in my home, and put them both in private mesh mode. They lasted about 6 hours before shutting off. I then put a 15 minute charge on both headsets and set them back up in the same test - private mesh sitting about 40' apart in my home. They lasted another 5 hours before shutting off on just that 15 minute quick charge. All of that testing was done with no intercom audio present and it makes sense to me that it's going to use more battery when the unit is driving speakers. So today, I've set up the same test again but have placed a small speaker inside one helmet against the mic and I'm streaming some classical music to it. I pick that source because it's sometimes too quiet to activate the intercom transmission and sometimes is louder and comes through on the other unit - trying to simulate something like an intercom conversation. Also, on the unit that is receiving the intercom audio on the private mesh, I've plugged in my Sensaphonics to see if that headset lasts longer than the one driving the SENA speakers. This test is still in progress and I'll post those results later today when the units shut off. I'm posting this up here to see if the collective wisdom has any advice or feedback on my testing methodology. If I don't' get 8 hours of talk time out of my 30K in private mesh it's very unlikely that I'll get my friends to adopt this thing - meaning no real benefit to me on our rides together. And honestly, given that we've gotten amazing battery life out of our SMH10 headsets, it would be a nuisance for all of us to start fooling around with having to charge these 30K units during the middle of a day long ride. If I consistently get significantly less than 8 hours of talk time out of the private mesh intercom, it'll be hard for me to justify this purchase and recommend them to my riding buddies.