Eartec LX600LI | Lithium 3.7 Volt Battery for HUB UltraLITE Headset
Lightweight HUB UltraLITE Rechargeable Li Ion Battery

Since UltraLITE headsets feature self contained, “All in One design all electronics, even the battery, is installed in the headset plastics. The batteries are lightweight and about the size of a book of matches. They charge in about 3 hours, run for 6 hours, and can be changed out in seconds. Since they are Li-ion, the batteries do not have to be “drained after each use, and will never develop a memory.