How to Use 4 pack 1s4p battery: Examples, Pinouts, and Specs

The 4 Pack 1s4p Battery is a configuration of four single-cell (1s) lithium-ion or lithium-polymer battery packs connected in parallel (4p). This arrangement increases the overall capacity of the battery pack while maintaining the same nominal voltage as a single cell. The 1s4p configuration is ideal for applications requiring extended runtime without increasing the voltage of the power source.

• Portable electronics (e.g., handheld devices, wearables)
• Low-power robotics
• Backup power supplies
• DIY electronics projects
• Powering microcontroller-based systems (e.g., Arduino, Raspberry Pi)

The following specifications are typical for a 4 Pack 1s4p Battery. Actual values may vary depending on the specific cells used.

The 4 Pack 1s4p Battery typically has two main terminals for connection:

Some battery packs may include additional pins for features like battery management systems (BMS) or temperature monitoring.

1. Connect the Terminals:
   • Connect the positive terminal (+) of the battery pack to the positive rail of your circuit.
   • Connect the negative terminal (-) to the ground (GND) of your circuit.
2. Charging the Battery:
   • Use a lithium-ion/lithium-polymer battery charger with a constant voltage of 4.2V.
   • Ensure the charging current does not exceed the recommended value (typically 1C of the total capacity).
3. Load Considerations:
   • Ensure the load connected to the battery does not draw more current than the maximum discharge rating of the pack.
4. Protection Circuit:
   • If the battery pack does not include a built-in protection circuit, consider adding an external BMS to prevent overcharging, over-discharging, and short circuits.

• Avoid Overcharging: Never charge the battery above 4.2V to prevent damage or safety hazards.
• Avoid Over-Discharging: Do not allow the voltage to drop below 3.0V per cell to maintain battery health.
• Temperature Monitoring: Avoid using or charging the battery in extreme temperatures (e.g., below 0°C or above 45°C).
• Parallel Connection Safety: Ensure all cells in the pack are of the same type, capacity, and charge level to avoid imbalances.
• Storage: Store the battery at a partial charge (around 3.7V per cell) in a cool, dry place when not in use.

The 4 Pack 1s4p Battery can be used to power an Arduino UNO via its VIN pin. Below is an example of how to connect the battery and monitor its voltage using an analog pin.

• Connect the positive terminal of the battery to the VIN pin of the Arduino.
• Connect the negative terminal of the battery to the GND pin of the Arduino.
• Use a voltage divider circuit to step down the battery voltage for monitoring.

// Define the analog pin for voltage monitoring
const int voltagePin = A0;

// Define the voltage divider resistors (R1 = 10k, R2 = 10k)
const float R1 = 10000.0; // Resistance of R1 in ohms
const float R2 = 10000.0; // Resistance of R2 in ohms

// ADC reference voltage (5V for Arduino UNO)
const float referenceVoltage = 5.0;

void setup() {
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  // Read the analog value from the voltage divider
  int analogValue = analogRead(voltagePin);

  // Calculate the battery voltage
  float batteryVoltage = (analogValue * referenceVoltage / 1023.0) * ((R1 + R2) / R2);

  // Print the battery voltage to the Serial Monitor
  Serial.print("Battery Voltage: ");
  Serial.print(batteryVoltage);
  Serial.println(" V");

  delay(1000); // Wait for 1 second before the next reading
}

1. Battery Not Charging:

   • Cause: Charger not compatible or insufficient charging current.
   • Solution: Use a charger specifically designed for lithium-ion/lithium-polymer batteries with the correct voltage and current ratings.

2. Battery Drains Quickly:

   • Cause: High load current or degraded cells.
   • Solution: Check the load current and ensure it is within the battery's discharge rating. Replace degraded cells if necessary.

3. Overheating During Use:

   • Cause: Excessive current draw or poor ventilation.
   • Solution: Reduce the load current and ensure proper airflow around the battery.

4. Voltage Imbalance Between Cells:

   • Cause: Cells in the pack are not matched or balanced.
   • Solution: Use a BMS with cell balancing or manually balance the cells before assembly.

• Always use a multimeter to measure the battery voltage and verify connections.
• If the battery pack includes a BMS, check for any fault indicators or error codes.
• Avoid shorting the terminals, as this can cause permanent damage or safety hazards.
• For long-term storage, charge the battery to around 50% capacity to minimize degradation.

By following these guidelines and best practices, you can safely and effectively use the 4 Pack 1s4p Battery in your projects.