Charge fully before initial use; typical charge times 2–6 hours depending on battery capacity and charger.
Storage: store battery at partial charge (40–60%) in cool, dry place if not used long-term.
Spare battery: recommended for extended deployments.
Low-battery behavior: radio should provide audible/visual low-battery warning and may reduce power or shut down to protect battery.
14. Accessories and Replacement Parts
Spare battery packs
Desktop chargers and rapid chargers
External speaker/microphone
Programming cable and PC software
Vehicle mounting bracket with DC cable
Replacement antenna (rubber duck, whip, mobile)
Belt clips and holsters
Fuses (for mobile installations)
The Keypad Lock (Long press)
To avoid accidental channel changes, the manual instructs users to hold the Menu (or a specific PF button) for 3 seconds. "L" will appear on the LCD. This is vital when carrying the radio on a belt clip. Dx-ar-8108 Radio User Manual
Chapter 7: Antenna Upgrades and External Connections
One page often overlooked in the Dx-ar-8108 Radio User Manual is the antenna specification. The factory antenna is a wide-band compromise for all bands. However, the manual explicitly states: "External antenna max input power: 1 watt (receive only)." This means: Charge fully before initial use; typical charge times
You can connect a roof-mounted discone antenna for superior scanner performance.
Never connect a transmitting antenna from a ham radio (which might output 50-100 watts). The high voltage will instantly destroy the Dx-ar-8108's receiver.
For shortwave, a simple long wire (20-50 feet) clipped to the telescopic antenna dramatically improves AM reception.
4. Controls and Connectors (typical layout)
Power / Volume knob
Channel selector knob or keypad for direct channel entry
Push-to-Talk (PTT) button (on microphone or side of handheld)
Function/Mode button for menu access
Up/Down arrow keys for channel/volume/menu navigation
Squelch control (physical or via menu)
Antenna connector (SMA/BNC/others depending on model)
External speaker/mic jack (Kenwood-style or proprietary)
Programming port / USB port for PC programming and firmware updates