The CS50-USB VoIP headset can be used for up to 8 hours of talking after a full charge.
The .Audio 995 provides up to 8 hours off a full charge
The GameCom X95 Uses AAA batteries
All of these headsets use rechargeable lithium-ion batteries that will last through approximately 500 full charging cycles. The CS50-USB battery (PN 64399-01) can be ordered individually, but the .Audio 995, .Audio 910/20 and Voyager 510-USB batteries are built into the units and cannot be replaced.