How to Use 2S LiPO Battery 2200mAh (35C): Examples, Pinouts, and Specs

The 2S LiPO Battery 2200mAh (35C), manufactured by OVONIC (Part ID: OVONIC Air), is a high-performance lithium polymer battery designed for demanding applications. With a nominal voltage of 7.4V, a capacity of 2200mAh, and a discharge rate of 35C, this battery is ideal for powering remote-controlled (RC) vehicles, drones, and other high-drain devices. Its lightweight and compact design make it a popular choice for hobbyists and professionals alike.

• RC cars, boats, and airplanes
• Drones and quadcopters
• Robotics and DIY electronics projects
• Portable power systems for high-drain devices

Below are the key technical details of the 2S LiPO Battery 2200mAh (35C):

The battery has two connectors: the XT60 connector for power delivery and the JST-XH balance connector for charging and cell balancing. The pinout for the JST-XH connector is as follows:

1. Connecting the Battery:

   • Use the XT60 connector to connect the battery to your device's power input.
   • Ensure the polarity matches the device's power input to avoid damage.
   • For charging, connect the JST-XH balance connector to a compatible LiPO balance charger.

2. Charging the Battery:

   • Use a LiPO balance charger that supports 2S (7.4V) batteries.
   • Set the charging current to a maximum of 2.2A (1C rate) for safe charging.
   • Always monitor the charging process and avoid overcharging.

3. Discharging the Battery:

   • Ensure the connected device does not exceed the continuous discharge rate of 77A.
   • Avoid discharging the battery below 3.0V per cell (6.0V total) to prevent damage.

• Storage: Store the battery at a voltage of 3.7V to 3.85V per cell (7.4V to 7.7V total) for long-term storage.
• Safety: Never puncture, short-circuit, or expose the battery to fire or water.
• Inspection: Regularly inspect the battery for swelling, damage, or loose connectors.
• Balancing: Use the balance connector during charging to ensure both cells are charged evenly.

If you are powering an Arduino UNO with this battery, you can use a voltage regulator (e.g., LM7805) to step down the 7.4V to 5V. Below is an example circuit and code:

• Connect the XT60 connector to the input of the voltage regulator.
• Connect the output of the voltage regulator to the Arduino UNO's 5V and GND pins.

// Example code to blink an LED using Arduino UNO powered by a 2S LiPO battery

const int ledPin = 13; // Pin connected to the onboard LED

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED on
  delay(1000);                // Wait for 1 second
  digitalWrite(ledPin, LOW);  // Turn the LED off
  delay(1000);                // Wait for 1 second
}

1. Battery Not Charging:

   • Cause: Incorrect charger settings or damaged balance connector.
   • Solution: Verify the charger is set to 2S (7.4V) mode and inspect the connectors.

2. Swollen Battery:

   • Cause: Overcharging, over-discharging, or physical damage.
   • Solution: Discontinue use immediately and dispose of the battery safely.

3. Device Shuts Down Prematurely:

   • Cause: Battery voltage dropped below the device's cutoff voltage.
   • Solution: Recharge the battery and avoid discharging below 3.0V per cell.

4. Uneven Cell Voltages:

   • Cause: Cells are out of balance due to improper charging.
   • Solution: Use a balance charger to equalize the cell voltages.

Q1: Can I use this battery for a 3S device?
A1: No, this is a 2S battery with a nominal voltage of 7.4V. Using it in a 3S (11.1V) device may result in insufficient power or damage.

Q2: How do I know when the battery is fully charged?
A2: A fully charged 2S LiPO battery will have a voltage of 8.4V (4.2V per cell). Most chargers will indicate when charging is complete.

Q3: What is the maximum safe discharge current?
A3: The maximum continuous discharge current is 77A (35C), and the maximum burst discharge current is 154A (70C).

Q4: Can I use this battery in cold weather?
A4: Yes, but performance may decrease in temperatures below -20°C. Pre-warm the battery for optimal performance.

By following these guidelines, you can safely and effectively use the 2S LiPO Battery 2200mAh (35C) in your projects.