If you own the radio, email the manufacturer's support team with the subject line: "Requesting verified user manual for S/N: [your serial number]".
This is where radios die. The DXAR8108 uses a Kenwood-style 2-pin connector (Tip: TX, Ring: RX, Sleeve: GND). However, some clones switch the Tip and Ring. The verified manual will have a schematic. dxar8108 radio user manual verified
Unverified forums will tell you to charge the radio for 24 hours. The verified manual will tell you the truth: Lithium-ion batteries used in the DXAR8108 have a charge controller. Overcharging reduces battery life by 40%. If you own the radio, email the manufacturer's
Counterfeit manuals are short (20 pages). The real DXAR8108 manual is usually 80+ pages, including sections on: However, some clones switch the Tip and Ring
The DXAR8108 is often re-badged under several brand names (e.g., Retevis, Radtel, or generic Chinese OEM). Go directly to the support page of the seller you bought it from.