How to Use LiPo 103450: Examples, Pinouts, and Specs

The LiPo 103450 is a lithium polymer (LiPo) battery manufactured by BLY with the part ID 103450. This battery is designed with a nominal voltage of 3.7V and is widely used in portable electronic devices due to its lightweight, compact size, and high energy density. Its size designation, 103450, refers to its dimensions: approximately 10mm thickness, 34mm width, and 50mm length.

• Portable electronic devices (e.g., handheld gadgets, wearables)
• Remote-controlled devices (e.g., drones, RC cars)
• IoT devices and embedded systems
• Backup power supplies for small electronics
• DIY electronics projects

The following table outlines the key technical details of the LiPo 103450 battery:

The LiPo 103450 typically has two leads or pins for connection:

Note: Some variants may include a third wire for a temperature sensor or protection circuit. Refer to the specific datasheet for details.

1. Connection: Connect the red wire to the positive terminal of your circuit and the black wire to the negative terminal. Ensure proper polarity to avoid damage.
2. Charging: Use a LiPo-compatible charger with a constant current/constant voltage (CC/CV) charging profile. Set the charging voltage to 4.2V and the current to no more than 1C (e.g., 2A for a 2000mAh battery).
3. Discharging: Ensure the load does not exceed the maximum discharge current (e.g., 4A for a 2000mAh battery). Use a protection circuit to prevent over-discharge below 3.0V.
4. Protection: Use a battery management system (BMS) or protection circuit module (PCM) to safeguard against overcharging, over-discharging, and short circuits.

• Avoid Overcharging: Never charge the battery above 4.2V, as this can cause overheating or damage.
• Avoid Over-Discharging: Do not let the voltage drop below 3.0V, as this can permanently reduce capacity.
• Temperature Range: Operate the battery within the recommended temperature range (typically 0°C to 45°C for charging and -20°C to 60°C for discharging).
• Storage: Store the battery at approximately 50% charge in a cool, dry place if not in use for extended periods.
• Safety: Do not puncture, crush, or expose the battery to fire or water.

To power an Arduino UNO with the LiPo 103450, you can connect the battery to a DC-DC step-up converter to boost the voltage to 5V. Below is an example circuit and code:

1. Connect the LiPo battery to the input of the DC-DC step-up converter.
2. Set the output of the converter to 5V.
3. Connect the output of the converter to the Arduino UNO's Vin and GND pins.

// Example code to read battery voltage using an Arduino UNO
// Assumes a voltage divider circuit is used to scale the battery voltage
// to a range readable by the Arduino's analog input (0-5V).

const int batteryPin = A0; // Analog pin connected to the voltage divider
const float voltageDividerRatio = 2.0; // Adjust based on your resistor values
const float referenceVoltage = 5.0; // Arduino's reference voltage (5V)

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

void loop() {
  int rawValue = analogRead(batteryPin); // Read the analog input
  float batteryVoltage = (rawValue / 1023.0) * referenceVoltage * voltageDividerRatio;

  // 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
}

Note: Use a voltage divider circuit to scale the battery voltage to a safe range for the Arduino's analog input. For example, use two resistors with a 1:1 ratio to divide the voltage by half.

1. Battery Not Charging

   • Cause: Charger not compatible or incorrect settings.
   • Solution: Ensure the charger is LiPo-compatible and set to 4.2V with the correct current limit.

2. Battery Drains Quickly

   • Cause: Over-discharge or aging battery.
   • Solution: Avoid discharging below 3.0V. Replace the battery if capacity is significantly reduced.

3. Battery Swells or Overheats

   • Cause: Overcharging, over-discharging, or physical damage.
   • Solution: Stop using the battery immediately. Dispose of it safely according to local regulations.

4. Arduino Resets or Malfunctions

   • Cause: Insufficient voltage or current from the battery.
   • Solution: Use a DC-DC converter to provide a stable 5V supply to the Arduino.

Q: Can I connect the LiPo 103450 directly to a 5V device?
A: No, the nominal voltage of the LiPo 103450 is 3.7V, which is insufficient for most 5V devices. Use a DC-DC step-up converter to boost the voltage to 5V.

Q: How do I know when the battery is fully charged?
A: The battery is fully charged when the charger indicates completion (typically when the voltage reaches 4.2V and the current drops to a minimal level).

Q: Can I use the battery in cold environments?
A: Yes, but performance may degrade at temperatures below 0°C. Ensure the battery is within its specified operating temperature range.

Q: Is the LiPo 103450 safe to use without a protection circuit?
A: No, it is highly recommended to use a protection circuit to prevent overcharging, over-discharging, and short circuits.

By following these guidelines, you can safely and effectively use the LiPo 103450 in your projects.