Description
The WeMos Lithium Battery Shield provides a reliable means of powering your WeMos D1 Mini or D1 Mini Pro microcontrollers completely wirelessly from a single-cell (3.7V) lithium-ion battery. The shield contains an integrated DC-DC step-up boost converter that takes the battery’s 3.7V output and steps it up to a stable 5V, supplying your WeMos Mini and attached shields with up to 1A of operating power.
When the battery is depleted, simply plug the shield into a USB power source using a standard mini USB cable, and it will automatically recharge the battery. Dual-color onboard LEDs indicate charging status (Red for charging, Green when complete), while jumper J1 allows you to configure the maximum charging current between 0.5A and 1A.
Note: Product images are for reference only; actual appearance, labeling, or component colors may vary slightly based on manufacturing batches. WeMos D1 Mini and lithium batteries are not included.
Key Features
- Wireless Power Solution: Powers your WeMos D1 Mini or D1 Mini Pro directly from a 3.7V lithium battery, eliminating the need for tethered USB cables.
- DC-DC Step-Up Boost Converter: Efficiently boosts the 3.3V–4.2V battery voltage up to a stable 5V output supplying up to 1A of power.
- Integrated Battery Charger: Built-in charging circuit with a Mini USB port automatically recharges your lithium cell when plugged into a 5V USB source.
- Selectable Charging Current (J1 Jumper): Features a jumper (J1) allowing you to set the maximum charging current to either 0.5A or 1A to match your battery capacity.
- Dedicated Battery & Power Ports: Includes a standard XH2-2.54mm connector (Port 1) for secure lithium battery connection (3.3V–4.2V range).
- Dual LED Status Telemetry: Red LED illuminates when charging is in progress; Green LED illuminates when the charging cycle is complete.
- Compact Shield Footprint: Measures 30 × 28 × 6 mm and weighs just 5 grams, designed to stack seamlessly with WeMos D1 Mini form-factor boards.
Benefits
- True Wireless Mobility: Deploy your IoT projects, sensors, and microcontrollers anywhere without being constrained by wall power or USB cords.
- Seamless Stackable Integration: Engineered to mount directly onto WeMos D1 Mini assemblies without clutter or complex wiring.
- Convenient USB Recharging: Easily replenish your battery pack using standard mini USB cables and 5V phone chargers or power banks.
- Flexible Charging Rates: Adapt the charging speed (0.5A or 1A) to suit various battery sizes and extend cell service life.
- Reliable Power Management: Integrated boost converter ensures clean, consistent 5V logic power for your microcontroller and connected peripherals.
Applications
- Wireless IoT Sensor Nodes: Autonomous Wi-Fi and Bluetooth sensor stations deployed around homes, greenhouses, or remote areas.
- Portable ESP8266/ESP32 Projects: Mobile maker builds, wearable electronics, and handheld gadgets powered by 18650 or LiPo cells.
- Remote Data Loggers: Field data acquisition systems requiring independent battery power and easy recharging capability.
- Smart Home Automation Remotes: Wireless controllers, custom wall switches, and status indicators powered by WeMos D1 Mini boards.
- Maker & Prototyping Gear: Rapid prototyping builds requiring a compact, stackable power and charging shield.
Package Includes
- 1 x WeMos D1 Lithium Battery Charger Board with Mini USB
- 1 x Instruction Manual / Quick Guide
Specifications
| Parameter | Specification |
|---|---|
| Item Type | WeMos D1 Mini Lithium Battery Shield & Charger Board |
| Battery Compatibility | Single-Cell 3.3V – 4.2V Lithium-Ion / LiPo Battery (via XH2-2.54mm Port 1) |
| Charging Port & Input | Mini USB Port | 5V DC Recommended (10V Max Input Limit) |
| Charging Current Settings | Selectable via J1 Jumper: 0.5A or 1.0A Max |
| Output Power (Boost Converter) | 5V DC Output (Max 1A Boost Supply for WeMos Mini & Shields) |
| Status Indicators | LED Telemetry: Red (Charging) | Green (Charging Complete) |
| Physical Dimensions (Length × Width × Height) | 30 mm × 28 mm × 6 mm |
| Net Weight / Shipping Weight | 5 g / 0.01 kg |
| Shipping Dimensions | 30 cm × 25 cm × 5 cm |
