User Manual
BTHF304 User Manual
. 8
2. Using Your Handsfree
2.1 Battery Charging and Usage
2.1.1 Battery Charging
This device contains a rechargeable Li-Polymer battery. First-time charging needs about 4 hours. Later-on
recharging needs 2-3 hours. Detailed charging procedures are as follows:
1. Referring to Figure 2, connect the charger cable to the device.
2. Plug the car charger into the cigarette lighter in your car to start charging. Both the Red and Blue LEDs will be
on during charging. Once the Red LED turns off, the battery is fully charged and you should disconnect the
charger.
Figure 2 Battery charging
You can also use the USB charging cable to charge the device on your PC, which will take longer to charge as the
power output of the USB port is lower than it is with the car charger.
Once the battery is fully charged, it will provide up to 8 hours of talk time and up to 600 hours of standby time.
When the battery is low, the device prompts “Battery low” once every 2 minutes and the Blue and Red LEDs
alternate every 3 seconds, and then you need to charge the battery as described above.
Note that, over-charging will reduce battery life. If a fully charged battery is left unused, it will lose power over
time. Extreme temperature (either too hot or too cold) will also affect its ability to charge, capacity, and lifetime.
2.2 Mounting your Handsfree
This Handsfree device can be easily mounted inside the car by using the Sun-Visor Clip to fix the product on the
sun-visor over the driver’s seat.
Figure 3 Mounting