Feature: 1. This lithium battery protection board is made from quality aluminium alloy material, which is sturdy and durable. 2. Adopt heat sink anodizing technology to stably and safely dissipate the temperature to the outside. 3. Multiple protective functions, including overcharge protection, overdischarge protection, overcurrent protection and short circuit protection. 4. This lithium battery protection board has quality thermal silicone for quick heat dissipation. 5. Balance charge, balance the characteristics of each battery in the battery pack, and extend battery life. Specification: Item Type: Lithium Battery Protection Board Material: Aluminium Alloy Cell Type: Three Tuple 3.7 Wiring Mode: Same Port Charge Balance: Yes Scope of Application: Electric Vehicles, Tricycles, Low-speed Vehicles, Energy Storage, Ups, Solar Inverters, 18-120V Equipment. Package List: 1 x Lithium Battery Protection Board2 x Cable Note: 1. First connect the B‑ line to the battery negative terminal (the B‑ line must be soldered with a short wire), and then connect the flat cable (before connecting the flat cable, be sure to unplug the flat cable from the board).2. Start wiring from B‑, connect B‑ to the total negative electrode of the battery, connect the second cable B‑1 to the positive electrode of the first string of batteries, connect the third cable B‑2 to the positive electrode of the second string of batteries, and connect the fourth cable B‑3 is connected to the positive electrode of the third series of batteries...and so on3. Finally, measure whether the total battery voltage is equal to the output voltage of the protection board, and the protection board works normally if it is equal.