i. Tech Dynamic Clip III User Manual page 4

Charging Your Headset
(fig-2)
The Headset comes with a built-in rechargeable battery.
Prior to using the headset, it is recommended to charge the
battery fully for the first time.
Charging your Headset
Connect the charger to an AC wall outlet (mains socket) and the
charger plug to the headset's charging socket (fig.2).The LED will be
red while charging.
IMPORTANT Charging indication will be delayed for a few seconds
if the headset has not been used for a long time or the battery is
drained.
Nominal ChargingTime
Charging the battery fully is normally within 3 hours. When the
battery is fully charged, the LED will turn blue and remains on.
Disconnect the charger from AC wall outlet (mains socket) and
the headset. Press and hold the MFB (fig.1) for 2 seconds to turn
the headset on, please refer to "Turning Your Headset On and
Off" on the next page.
Talk & Standby Time
The fully charged battery offers up to 4 hours talk time and up to
160 hours standby time. When no calls are in progress, the headset
remains turned on in standby mode.
Low Battery
When the headset is on and the battery becomes low, the LED flashes
red and the headset emits a beep every 1 minute. Please recharge the
battery as described above.