Retevis RB20 Manuel D'utilisation page 4

Attributes of Lithium battery
After repeated charging process, the battery capacity will
decrease.
The battery degenerates gradually even without being
used.
More time is required if charging the battery in cool
conditions.
Charging and storage of the battery in relatively warm
conditions will jeopardize its service life.
Please do not store the radio inside a vehicle or near
heating equipment.
If the duration of the battery shortens significantly, please
replace the battery immediately to prevent any fluid leaks.
Charging the Lithium battery
After the AC adaptor is connected and the battery is
placed in the charger, the indicator will show red which
means the battery is charging. The green light will
indicate the battery is fully charged.
The light will turn off if the temperature is too high or low,
the battery is damaged, the charger is damaged or the
connection is poor.
Installing antenna
Hold the radio and antenna, turn the antenna
clockwise until it is tightened.
Installing belt clip
If required, screw the belt clip onto the back of the radios
using the two screw holes shown on the image below.
Installing SIM card
Please insert effective SIM card before use, make
sure the SIM card can be effective in 4G/3G radio.
Long press volume button to switch off the radio.
Remove the battery by pulling down the latch, then
pushing the battery backwards along the guides.
Lift SIM socket cover, place SIM card in the socket
in the correct position.
Replace the battery.
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