• Connect BATT1:1 (positive terminal) to U1:20 (BAT +).
• Connect BATT1:2 (negative terminal) to U1:21 (BAT -).

1. JST PH Series: This series is popular for small electronics and can handle currents typically around 2A, which should be more than sufficient for your 3V application.
   • Consider a 2-pin JST PH connector for pairing with the battery, ensuring it is rated for the current you expect it to handle.
2. JST XH Series: This series can handle slightly higher currents compared to the PH series and is also reliable for battery connections.
   • The 2-pin JST XH connector is another solid choice. While it may be bulkier than the PH, it's robust for reliable connections.
3. Ensure Compatibility: Double-check the connector on your battery to ensure compatibility with the JST connector series you're choosing. The pitch (space between the pins) is a primary compatibility factor.

1. JST Connector:
   • Pin 1: Typically used for the positive terminal of the battery.
   • Pin 2: Typically used for the negative terminal of the battery.
2. Board Connections:
   • Connect $J1:PIN1$ to $U1:20 \, \text{(BAT +)}$.
   • Connect $J1:PIN2$ to $U1:21 \, \text{(BAT -)}$.

1. LiPo Battery: Make sure the battery voltage matches the required input voltage of the board, typically 3.7V for single-cell LiPo.
2. JST Connector: Typically a 2-pin JST-PH connector for the battery.
3. Charge Management IC: Such as the MCP73831 or equivalent, to charge the battery.
4. Protection Circuit: To prevent overcharging, over-discharging, and short circuit. This can sometimes be built into the battery.

1. JST Connector: Connect the battery to the JST connector.
2. Battery to Charge Management IC:
   • Connect the positive terminal of the JST connector to the input pin of the charge management IC.
   • Connect the negative terminal of the JST connector to GND.
3. Charge Management IC to U1:
   • Connect the output pin of the charge management IC to $U1:BAT +$.
   • Ensure that the GND of the charge management IC is connected to $U1:GND$.

• Connect JST Connector (+) to Charge IC:VDD.
• Connect JST Connector (-) to Charge IC:GND.
• Connect Charge IC:VDD OUT to $U1:BAT +$.
• Connect Charge IC:GND to $U1:GND$.

1. LiPo Battery: Assume a single-cell 3.7V LiPo battery.
2. JST-PH 2-Pin Connector: For connecting the battery.
3. MCP73831 Charge Management IC: Efficient, small package, and supports single-cell LiPo batteries.
4. Additional Components for MCP73831:
   • A resistor to set the charging current (let's assume 1kΩ for a moderate current).
   • A capacitor to stabilize the power supply (typically 1µF).

1. JST Connector to MCP73831:
   • Connect the positive terminal of the JST connector to MCP73831:VBAT.
   • Connect the negative terminal of the JST connector to GND.
2. MCP73831 to U1:
   • Connect MCP73831:OUT to U1:BAT +.
   • Ensure the GND of the MCP73831 is connected to U1:GND and JST Negative.
3. Resistor and Capacitor:
   • Connect a 1kΩ resistor from MCP73831:PROG to GND.
   • Connect a 1µF capacitor from the input (USB, etc.) to GND for stability.

• Connect an external USB power line to MCP73831:VDD.

• Connect JST Connector (+) to MCP73831:VBAT.
• Connect JST Connector (-) to MCP73831:GND and U1:GND.
• Connect MCP73831:OUT to U1:BAT +.
• Connect a 1kΩ resistor from MCP73831:PROG to GND.
• Connect a 1µF capacitor from MCP73831:VDD to GND.
• Connect external power (e.g., USB 5V) to MCP73831:VDD.

graph TD;
    JST["JST Connector"]
    Battery["LiPo Battery"]
    MCP["MCP73831"]
    Resistor["1kΩ Resistor"]
    Capacitor["1µF Capacitor"]
    External["External Power (USB)"]
    U1["Seeed Studio XIAO ESP32-C6"]
    Ground["GND"]

    JST -- Positive --> MCP:.VBAT
    JST -- Negative --> Ground
    Battery -- Connected --> JST
    MCP:.OUT -- BAT+ --> U1
    MCP -- GND --> Ground
    Resistor -- PROG --> MCP
    Resistor -- GND --> Ground
    Capacitor -- Across VDD and GND --> MCP
    External -- VDD --> MCP

    Ground -- Connects to --> U1:GND

    classDef component fill:#f9f,stroke:#333,stroke-width:2px;
    class JST,Battery,MCP,Resistor,Capacitor,External,U1,Ground component;

• JST Connector: Connects the LiPo battery to the MCP73831 and the board.
• MCP73831: Manages battery charging and supplies power to the board.
• 1kΩ Resistor: Sets the charging current for the battery.
• 1µF Capacitor: Stabilizes the power supply to the MCP73831.
• External Power Source: Provides power for charging the battery when connected.

1. Search by Name: Use terms like "JST connector", "JST-PH 2-pin", or "battery connector".
2. Use Specific Dimensions: If you know the specifics of the connector you need, include dimensions like "2.0mm JST connector".
3. Check Popular Variants: Common JST connectors used for LiPo batteries include:
   • "JST-PH", which is a 2.0mm pitch connector.
   • "JST-XH", which is a 2.5mm pitch connector.
4. Look for Keywords: Include words like "battery connector", "LiPo connector", or "2-pin connector" in your search.
5. Check for Alternatives: If you still can't find the specific JST connector, you might find generic connectors that fit your needs. Searching for "2-pin connector" or "connector housing" may yield useful results.

1. Battery Connections:
   • Connect J1:VBAT to the positive terminal of your battery.
   • Connect J1:GND to the negative terminal of your battery.
   • Connect U1:BAT + to the battery positive terminal.
   • Connect U1:BAT - to the battery negative terminal.
2. Charger Connections:
   • Connect the output from your charger (e.g., from a USB input) to power the module and charge the battery. Typically, this includes connecting to the charging module's input pins.
   • Ensure the charging module's output, which powers the system, is connected to the XIAO ESP32C6 supply pins.
3. Microcontroller Powering:
   • Connect U1:3V3 and U1:5V to the regulated output from the charging module or battery, depending on the module and physical circuit connections.
   • Connect U1:GND and U1:GND_1 to your system ground, ensuring common ground throughout the circuitry.