I have used Chatterbox on 2 HJC helmets for 2 years. We used the previous Chatterbox model for the two years prior to that. The older model only had about a 4 hour active run time and would die halfway through a long day of sledding. The new model (I think its xbi2 plus) works great. I'd say at least 8-10 hours. The units are fine, the recharger is a little finicky, but acceptable. When I ride alone, I listen to music. When riding in groups we usually leave the units live. You can accept phone calls if in cell range. It is great to be able to communicate with eack other. We are heading to Pittsburg Friday for 4 days and there will be a total of 4 riders with them. You can have something like 20 riders with them, but onky 3 can talk at a time. I did have an issue with a unit when I first got them. Chatterbox was great, all apologies and overnighted a replacenent to me. Hope this helps!
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