The BATERIA 18650 X2 is a rechargeable lithium-ion battery pack consisting of two 18650 cells. Known for its high energy density, compact size, and long cycle life, this battery pack is widely used in portable electronics, electric vehicles, power banks, and DIY projects. Its dual-cell configuration provides increased capacity and voltage, making it suitable for applications requiring higher power output.
Common applications include:
Below are the key technical details for the BATERIA 18650 X2:
Parameter | Specification |
---|---|
Battery Type | Lithium-Ion (Li-Ion) |
Configuration | 2 x 18650 cells |
Nominal Voltage | 7.4V (3.7V per cell in series) |
Capacity | Typically 2000–3500mAh per cell |
Maximum Discharge Current | 10A (varies by cell model) |
Charging Voltage | 8.4V (fully charged) |
Charging Current | Standard: 0.5C, Fast: 1C |
Protection Circuit | Optional (depends on the model) |
Dimensions | ~36mm x 70mm x 20mm (varies slightly) |
Weight | ~90g (varies by cell capacity) |
The BATERIA 18650 X2 typically has two terminals for connection:
Pin | Label | Description |
---|---|---|
1 | Positive (+) | Positive terminal for power output |
2 | Negative (-) | Negative terminal for power output |
Note: Some battery packs may include additional pins for a built-in protection circuit (e.g., BMS - Battery Management System). These pins are used for monitoring and balancing the cells.
Check the Voltage and Polarity:
Charging the Battery:
Connecting to an Arduino UNO:
Safety Precautions:
Below is an example of using the BATERIA 18650 X2 to power an Arduino UNO and read the battery voltage using an analog pin:
// Define the analog pin connected to the voltage divider
const int batteryPin = A0;
// Voltage divider resistors (e.g., R1 = 10k, R2 = 10k)
const float R1 = 10000.0; // Resistance of R1 in ohms
const float R2 = 10000.0; // Resistance of R2 in ohms
// Arduino reference voltage
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
Serial.print("Battery Voltage: ");
Serial.print(voltage);
Serial.println(" V");
delay(1000); // Wait 1 second before the next reading
}
Note: Use a voltage divider to scale down the battery voltage to a safe range (0–5V) for the Arduino's analog input.
Battery Not Charging:
Battery Drains Quickly:
Overheating During Use:
Arduino Not Powering On:
Can I connect more than two 18650 cells in series? Yes, but ensure the device or circuit is compatible with the higher voltage. Use a BMS for safety.
How do I know when the battery is fully charged? The charger will typically indicate a full charge when the voltage reaches 8.4V and the current drops to a minimal level.
Can I use the battery without a protection circuit? It is not recommended, as it increases the risk of overcharging, over-discharging, and short circuits.
What is the typical lifespan of the BATERIA 18650 X2? With proper care, the battery can last 300–500 charge cycles before significant capacity loss.
By following this documentation, you can safely and effectively use the BATERIA 18650 X2 in your projects.