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3.7V 1200mAh 18650 Battery

3.7V 1200mAh 18650 Battery 3.7V 1200mAh 18650 Battery
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Component Name

3.7V 1200mAh 18650 Battery

Overview

The 3.7V 1200mAh 18650 Battery is a rechargeable lithium-ion battery designed for use in a variety of Internet of Things (IoT) devices, electric vehicles, and portable electronics. This battery offers a reliable and efficient power source for applications requiring a compact and lightweight energy storage solution.

Functionality

The primary function of the 3.7V 1200mAh 18650 Battery is to store electrical energy that can be utilized by a connected device or system. The battery operates by converting chemical energy into electrical energy through an electrochemical reaction. This process involves the movement of lithium ions between the positive cathode and negative anode, allowing the battery to supply a stable voltage and current to the connected device.

Key Features

  • Voltage: 3.7V

The nominal voltage of the battery, indicating the maximum voltage it can supply to a connected device.

  • Capacity: 1200mAh

The maximum amount of electric charge the battery can store, measured in milliamperes-hours (mAh).

A higher capacity indicates a longer battery life and more power availability for the connected device.

  • Chemistry: Lithium-Ion (Li-ion)

The type of battery chemistry used, which provides a high energy density, low self-discharge rate, and relatively long cycle life.

  • Size: 18650

The physical size of the battery, which refers to its diameter (18mm) and height (65mm).

  • Rechargeable: Yes

The battery can be charged and discharged multiple times, making it a cost-effective and environmentally friendly option.

  • Cycle Life: 300 cycles

The number of charge/discharge cycles the battery can withstand before its capacity starts to degrade.

  • Self-Discharge: 20%/month

The rate at which the battery loses its charge when not in use, measured as a percentage of capacity lost per month.

  • Operating Temperature: -20C to 45C

The recommended temperature range for optimal performance and safety.

  • Safety Features:

Built-in protections against overcharge, over-discharge, and short-circuit to prevent damage to the battery or connected device.

Applications

The 3.7V 1200mAh 18650 Battery is suitable for a wide range of applications, including

IoT devices (sensors, trackers, and wearable devices)

Electric vehicles (EVs) and hybrid electric vehicles (HEVs)

Portable electronics (laptops, smartphones, and tablets)

Renewable energy systems (solar and wind power)

Important Notes

Always follow proper charging and handling procedures to ensure the battery's safety and longevity.

Avoid overcharging, deep discharging, or exposing the battery to extreme temperatures to prevent damage or degradation.

Store the battery in a cool, dry place away from flammable materials and avoid short-circuiting the terminals.

Pin Configuration

  • 3.7V 1200mAh 18650 Battery Documentation
  • Pin Description:
  • The 3.7V 1200mAh 18650 Battery has two pins, which are used to connect it to an external device or charging circuit. The pins are:
  • 1. Positive Terminal (Cathode):
  • Function: Provides the positive voltage (3.7V) from the battery to the connected device.
  • Polarity: Positive
  • Recommended Wire Color: Red
  • Connection: Connect to the positive terminal of the device or charging circuit.
  • 2. Negative Terminal (Anode):
  • Function: Provides the negative voltage (0V) from the battery to the connected device.
  • Polarity: Negative
  • Recommended Wire Color: Black
  • Connection: Connect to the negative terminal of the device or charging circuit.
  • Pin Connection Structure:
  • When connecting the 18650 battery to a device or charging circuit, follow this structure:
  • Connect the Positive Terminal (Cathode) to the Positive Input of the device or charging circuit.
  • Connect the Negative Terminal (Anode) to the Negative Input of the device or charging circuit.
  • Important Safety Notes:
  • Always ensure the correct polarity when connecting the battery to avoid damage or even fire.
  • Use protection circuits, such as overcharge protection, over-discharge protection, and short-circuit protection, to prevent damage to the battery and connected devices.
  • Handle the battery with care to avoid physical damage, which can cause internal shorts and lead to safety issues.
  • Recommended Connection Diagram:
  • ```
  • +---------------+
  • | 3.7V 1200mAh |
  • | 18650 Battery |
  • +---------------+
  • | |
  • | Positive |
  • | (Cathode) |
  • | |
  • v v
  • +---------------+---------------+
  • | Device/Charging |
  • | Circuit Positive |
  • | Input |
  • +---------------+---------------+
  • | |
  • | Negative |
  • | (Anode) |
  • | |
  • v v
  • +---------------+---------------+
  • | Device/Charging |
  • | Circuit Negative |
  • | Input |
  • +---------------+---------------+
  • ```
  • Remember to follow proper safety precautions and handling guidelines when working with batteries and electrical connections.

Code Examples

3.7V 1200mAh 18650 Battery Documentation
Overview
The 3.7V 1200mAh 18650 Battery is a rechargeable lithium-ion battery commonly used in IoT devices, robots, and other portable electronics. This battery has a nominal voltage of 3.7V, a capacity of 1200mAh, and a physical dimension of 18mm in diameter and 65mm in length.
Technical Specifications
Nominal Voltage: 3.7V
 Capacity: 1200mAh
 Dimensions: 18mm (diameter) x 65mm (length)
 Weight: 45g
 Cycle Life: >500 cycles
 Self-Discharge Rate: <20% per month
 Operating Temperature: -20C to 45C
 Charging Temperature: 0C to 45C
Using the 3.7V 1200mAh 18650 Battery in Various Contexts
### Example 1: Arduino-Based Robot Power Supply
In this example, we'll demonstrate how to use the 3.7V 1200mAh 18650 Battery to power an Arduino-based robot. We'll connect the battery to a voltage regulator (e.g.,Voltage Regulator 5V 1A) to regulate the voltage to 5V for the Arduino board.
Circuit Diagram
Connect the positive terminal of the 18650 battery to the input pin of the voltage regulator.
 Connect the output pin of the voltage regulator to the Vin pin of the Arduino board.
 Connect the negative terminal of the 18650 battery to the GND pin of the Arduino board.
Arduino Code
```c
void setup() {
  // Initialize the Arduino board
  Serial.begin(9600);
}
void loop() {
  // Read the battery voltage using an analog pin
  int batteryVoltage = analogRead(A0);
  float voltage = batteryVoltage  5.0 / 1023.0;
  
  // Print the battery voltage to the serial console
  Serial.print("Battery Voltage: ");
  Serial.print(voltage);
  Serial.println("V");
  
  delay(1000);
}
```
### Example 2: ESP32 Wi-Fi Module Power Supply
In this example, we'll demonstrate how to use the 3.7V 1200mAh 18650 Battery to power an ESP32 Wi-Fi module. We'll connect the battery directly to the ESP32 module, as it can operate within a voltage range of 2.2V to 3.6V.
Circuit Diagram
Connect the positive terminal of the 18650 battery to the VCC pin of the ESP32 module.
 Connect the negative terminal of the 18650 battery to the GND pin of the ESP32 module.
ESP32 Code (MicroPython)
```python
import machine
# Initialize the ESP32 module
machine.freq(160000000)
# Read the battery voltage using an analog pin
battery_voltage = machine.ADC(machine.Pin(32)).read()
voltage = battery_voltage  3.3 / 4095.0
# Print the battery voltage to the console
print("Battery Voltage: {:.2f}V".format(voltage))
```
Note: The examples provided are for demonstration purposes only and may require additional components or modifications to work in your specific use case. Always ensure proper safety precautions when working with batteries and electronic components.