The Adafruit Mini Lipo is a compact and lightweight lithium polymer (LiPo) battery designed for powering portable and low-power electronic projects. These batteries are known for their high energy density and rechargeability, making them ideal for applications where size and weight are critical factors, such as wearable devices, small robots, and DIY electronics projects.
Explore Projects Built with Adafruit Mini Lipo
Use Cirkit Designer to design, explore, and prototype these projects online. Some projects support real-time simulation. Click "Open Project" to start designing instantly!
This circuit features an Arduino UNO microcontroller powered by a lipo battery, interfaced with an HC-05 Bluetooth Module for wireless communication and a DFPlayer MINI for audio playback through a connected loudspeaker. An I2C LCD 16x2 Screen is included for display purposes, with the Arduino facilitating control and data exchange between the components. The provided code skeleton suggests that the Arduino is programmed using the Arduino IDE, but the specific functionality is not implemented in the given code.
This circuit is a portable system powered by a 3.7V LiPo battery, which is boosted to 5V using an Adafruit PowerBoost 1000C to power a Raspberry Pi Zero and an EmStat Pico. The Raspberry Pi Zero interfaces with an OLED display via I2C and a tactile switch for user input, while the EmStat Pico communicates with the Raspberry Pi over UART for data acquisition or control purposes.
This circuit is a voltage monitoring and display system powered by a 3.7V LiPo battery. It uses an ATmega328P microcontroller to read voltage levels from a DC voltage sensor and displays the readings on a 1.3" OLED screen. The system includes a battery charger and a step-up boost converter to ensure stable operation and power management.
This circuit features an Arduino Pro Mini connected to a 0.96" OLED display, a Heart Pulse Sensor, and an mlx90614 infrared temperature sensor, all powered by a 3.7v LiPo battery. The OLED and mlx90614 communicate with the Arduino via I2C (SDA/SCL lines), while the Heart Pulse Sensor's signal is read through an analog input (A0). The purpose of this circuit is likely to monitor and display heart rate and temperature readings.
The Adafruit Mini Lipo batteries come in various capacities and sizes. Below is a table for a generic Adafruit Mini Lipo battery. Please refer to the specific model's datasheet for exact specifications.
Specification
Detail
Nominal Voltage
3.7V
Charge Voltage
4.2V
Capacities Available
100mAh to 2000mAh (typical)
Continuous Discharge
Varies by capacity (check datasheet)
Peak Discharge
Varies by capacity (check datasheet)
Charge Current
1C (capacity in A) recommended
Operating Temperature
-20°C to 60°C
Connector Type
JST-PH 2.0mm
Pin Configuration and Descriptions
The Adafruit Mini Lipo typically comes with a 2-pin JST-PH connector. The pinout is as follows:
Pin #
Description
1
Positive (+)
2
Negative (-)
Usage Instructions
Integrating with a Circuit
Connection: Connect the Adafruit Mini Lipo to your project using the JST-PH connector. Ensure correct polarity by matching the positive and negative wires to the corresponding inputs on your device.
Charging: To charge the Adafruit Mini Lipo, use a LiPo-compatible charger with overcharge protection. Connect the battery to the charger and monitor the charging process.
Discharging: When powering a device, monitor the battery voltage to avoid deep discharge, which can damage the battery.
Best Practices
Never exceed the recommended charge and discharge rates.
Avoid physical damage to the battery, which can lead to dangerous leaks or fires.
Do not leave the battery charging unattended.
Store the battery in a cool, dry place when not in use.
Use a battery management system (BMS) for projects involving multiple LiPo cells.
Troubleshooting and FAQs
Common Issues
Battery not charging: Ensure the charger is functioning and compatible with LiPo batteries. Check the connections and the integrity of the wires and connector.
Reduced capacity or runtime: LiPo batteries have a limited number of charge cycles. If the battery has been used extensively, it may be time to replace it.
Swelling or deformation: Stop using the battery immediately. Swelling can indicate overcharging, deep discharge, or damage to the battery.
FAQs
Q: Can I charge the Adafruit Mini Lipo with a standard battery charger?
A: No, you must use a charger specifically designed for LiPo batteries to prevent damage.
Q: How do I know when the battery is fully charged?
A: A proper LiPo charger will indicate when the battery is fully charged, typically by switching to a trickle charge mode or lighting an indicator LED.
Q: Is it safe to leave the Adafruit Mini Lipo plugged into my project overnight?
A: It is not recommended to leave the battery connected to a circuit that is not actively monitored, especially if the circuit does not have over-discharge protection.
Q: Can I connect multiple Adafruit Mini Lipo batteries in series or parallel?
A: This is possible but requires a good understanding of battery management and the implementation of a BMS to ensure safe operation.
Example Code for Arduino UNO
Below is an example code snippet for reading the battery voltage using an Arduino UNO. This assumes you have a voltage divider set up to safely measure the battery voltage.
const int batteryPin = A0; // Analog pin connected to voltage divider output
void setup() {
Serial.begin(9600);
}
void loop() {
int sensorValue = analogRead(batteryPin); // Read the analog value
float voltage = sensorValue * (5.0 / 1023.0) * 2; // Convert to battery voltage
Serial.print("Battery Voltage: ");
Serial.println(voltage);
delay(1000); // Wait for a second before next reading
}
Note: The * 2 in the voltage calculation accounts for a voltage divider that halves the battery voltage to keep it within the safe reading range of the Arduino analog pin. Adjust the multiplier based on your specific voltage divider ratio.
Remember to include proper safety measures when working with LiPo batteries, and always consult the datasheet for the specific Adafruit Mini Lipo model you are using.
Open Project in Cirkit Designer
