I came to the opposite conclusion. I use my wireless head set A LOT. In looking at the batteries, I discovered that the G930 has replaceable batteries but it looks like the 2100 does not. At present, I am using a Plantronics Audio.995 headset. This is my second set. After the first set's battery died, I bought another set with the idea of replacing the battery in the first and use it as a backup. No such luck due to the internal charging circuitry. It is getting about time for this unit's battery to die. I don't like having to trash a perfectly good headset because of the battery.