Product Configuration 

This holder is a passive component but requires correct wiring for safe operation. Here is the standard configuration:

1. Battery Orientation:

   • Insert the three 18650 batteries according to the + and – symbols printed on the PCB. Incorrect insertion can cause a short circuit.

   • The batteries are connected in series. The positive (+) terminal of one cell is connected to the negative (-) terminal of the next.

2. Output Terminals:

   • The total voltage output is available at the two main terminals on the PCB:

     • Positive Output (+): This is the positive terminal of the last cell in the series chain.

     • Negative Output (-): This is the negative terminal of the first cell in the series chain.

   • The nominal output voltage will be approximately 11.1V (3.7V x 3) and can be up to 12.6V (4.2V x 3) when fully charged.

3. Connecting a BMS (Highly Recommended):

   • For safe operation, you must connect a 3S Lithium-Ion BMS (Battery Management System).

   • The BMS has two sets of connections:

     • B- (Battery Negative): Solder to the Negative Output (-) pad on the holder.

     • P- (Load Negative): This becomes the new negative output for your project.

     • B1 & B2 (Balance Wires): Solder these to the connection points between the cells. Your holder should have labeled pads for these (e.g., B1, B2, B3).

     • P+ (Positive Output): This is connected directly to the Positive Output (+) pad on the holder.

4. Final Project Connection:

   • Your project’s positive wire should connect to P+ on the BMS.

   • Your project’s negative wire should connect to P- on the BMS.