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How to Use Batería 303035: Examples, Pinouts, and Specs

Image of Batería 303035Design with Batería 303035 in Cirkit Designer

Introduction

The Batería 303035 is a compact lithium polymer (LiPo) battery designed for use in small electronic devices. With a nominal voltage of 3.7V and a lightweight, slim profile, it is ideal for portable applications where space and weight are critical factors. This battery is commonly used in devices such as wearable electronics, IoT gadgets, remote controls, and small robotics.

Its rechargeable nature and high energy density make it a reliable power source for projects requiring consistent and long-lasting performance.

Explore Projects Built with Batería 303035

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Image of Battery-Powered 18650 Li-ion Charger with USB Output and Adjustable Voltage Regulator: A project utilizing Batería 303035 in a practical application
Battery-Powered 18650 Li-ion Charger with USB Output and Adjustable Voltage Regulator

This circuit is a battery management and power supply system that uses three 3.7V batteries connected to a 3S 10A Li-ion 18650 Charger Protection Board Module for balanced charging and protection. The system includes a TP4056 Battery Charging Protection Module for additional charging safety, a Step Up Boost Power Converter to regulate and boost the voltage, and a USB regulator to provide a stable 5V output, controlled by a push switch.

Open Project in Cirkit Designer

Technical Specifications

Below are the key technical details of the Batería 303035:

Parameter Value
Nominal Voltage 3.7V
Capacity 300mAh
Maximum Charging Voltage 4.2V
Discharge Cutoff Voltage 3.0V
Maximum Discharge Current 1C (300mA)
Standard Charge Current 0.5C (150mA)
Dimensions (L x W x H) 30mm x 30mm x 3.5mm
Weight ~6g
Chemistry Lithium Polymer (LiPo)
Connector Type JST 2-pin (commonly used)

Pin Configuration and Descriptions

The Batería 303035 typically comes with a JST 2-pin connector. Below is the pin configuration:

Pin Description
Red Positive terminal (+)
Black Negative terminal (-)

Usage Instructions

How to Use the Batería 303035 in a Circuit

  1. Connection:

    • Connect the red wire (positive terminal) to the positive input of your circuit.
    • Connect the black wire (negative terminal) to the ground (GND) of your circuit.
    • Ensure the polarity is correct to avoid damage to the battery or circuit.

  2. Charging:

    • Use a dedicated LiPo battery charger with a constant current/constant voltage (CC/CV) charging profile.
    • Set the charging voltage to 4.2V and the charging current to 0.5C (150mA) for safe operation.
    • Avoid overcharging or deep discharging the battery to prolong its lifespan.

  3. Protection Circuit:

    • It is recommended to use a battery protection circuit module (PCM) to prevent overcharging, over-discharging, and short circuits.

  4. Mounting:

    • Secure the battery in your device using double-sided tape or a battery holder to prevent movement during operation.

Important Considerations and Best Practices

Example: Connecting to an Arduino UNO

The Batería 303035 can be used to power an Arduino UNO via its VIN pin. Below is an example:

  1. Connect the red wire of the battery to the VIN pin of the Arduino UNO.
  2. Connect the black wire of the battery to the GND pin of the Arduino UNO.
  3. Ensure the battery voltage is within the acceptable range for the Arduino's voltage regulator (7-12V recommended for VIN). If the voltage is insufficient, use a boost converter to step up the voltage.

Sample Code for Monitoring Battery Voltage

You can use a voltage divider circuit to monitor the battery voltage with the Arduino UNO. Here's an example:

// Define the analog pin connected to the voltage divider
const int batteryPin = A0;

// Voltage divider resistor values (in ohms)
const float R1 = 10000.0; // Resistor connected to battery positive
const float R2 = 10000.0; // Resistor connected to ground

// Reference voltage of the Arduino (5V for most boards)
const float referenceVoltage = 5.0;

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

void loop() {
  int rawValue = analogRead(batteryPin); // Read the analog value
  float voltage = (rawValue / 1023.0) * referenceVoltage; // Convert to voltage
  voltage = voltage * (R1 + R2) / R2; // Adjust for voltage divider ratio

  Serial.print("Battery Voltage: ");
  Serial.print(voltage);
  Serial.println(" V");

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

Note: Ensure the voltage divider reduces the battery voltage to a safe level for the Arduino's analog input (0-5V).

Troubleshooting and FAQs

Common Issues

  1. Battery Not Charging:

    • Cause: Faulty charger or incorrect charging voltage/current.
    • Solution: Verify the charger is functioning correctly and set to 4.2V with a current limit of 150mA.

  2. Battery Drains Quickly:

    • Cause: Excessive load or aging battery.
    • Solution: Check the current draw of your circuit and ensure it does not exceed the battery's maximum discharge current (300mA). Replace the battery if it has degraded.

  3. Battery Swells or Overheats:

    • Cause: Overcharging, over-discharging, or physical damage.
    • Solution: Stop using the battery immediately and dispose of it safely. Always use a protection circuit and proper charger.

  4. No Output Voltage:

    • Cause: Protection circuit triggered due to over-discharge or short circuit.
    • Solution: Recharge the battery using a compatible charger to reset the protection circuit.

FAQs

By following these guidelines, you can safely and effectively use the Batería 303035 in your projects.