Feature: 1. Using heat sink anodic oxidation technology, the temperature can be radiated to the outside stably and safely. 2. Multi protection by brushing with three proof paint. High quality thermal silica gel, rapid heat dissipation. 3. Balance charge, balance the characteristics of each battery in the battery pack, and extend battery life. 4. The lithium battery protection board is made of aluminum alloy, which is durable and has a long service life. 5. The lithium battery charger board is light, easy to carry and store, and easy to operate. Specification: Item Type: Protection Board Material: Aluminum Alloy Charging Current: ≤ 15A Discharge Current: 45A. Package List: 1 x Protection Board 2 x Collection 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, and connect the third cable B‑2 to the positive electrode of the second string of batteries, and 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.