Description
The Dual Micro USB 3.7V to 5V 2A Power Bank DIY Module is a compact and versatile power management circuit board designed for makers and hobbyists building custom portable chargers. Compatible with 3.7V–4.2V lithium-ion (18650 flat-top) and lithium polymer (LiPo) cells, this module allows you to transform spare batteries into a fully functional power bank featuring dual USB output ports.
Equipped with an integrated lithium battery protection IC, the module provides reliable hardware safeguards against overcurrent, overvoltage, and deep under-voltage discharge. It features a 4-level LED indicator for quick battery level checks, an intelligent auto-shutdown feature when idle, and dual Micro-USB inputs for flexible recharging.
Note: Batteries must be connected in parallel (working voltage 3.2V–4.2V). Pay strict attention to polarity when soldering to the B+ and B- terminals; reverse installation will permanently burn the motherboard. Do not mix old and new batteries or different brands/models. Batteries and enclosure shell are not included.
Key Features
- Dual USB Output Ports: Features two standard USB output interfaces capable of delivering up to 5V 2A power to your devices.
- Flexible Dual Micro-USB Inputs: Input charging ports support standard 5V constant voltage supplies (matched best with 1A or higher chargers).
- Integrated Battery Protection IC: Built-in hardware safeguards protect against overcurrent, overvoltage, and under-voltage conditions.
- 4-Level LED Power Display: Onboard LED indicators display real-time battery capacity status at a glance.
- Smart Auto-Shutdown: Automatically enters an intelligent shutdown state when not in use to conserve battery power.
- Wide Battery Compatibility: Compatible with 18650 lithium cells, cell phone batteries, tablet batteries, and 3.7V–4.2V polymer LiPo batteries connected in parallel.
Benefits
- Custom Power Bank Creation: Easily repurpose spare lithium cells and LiPo packs into a reliable, portable USB power bank.
- Enhanced Operational Safety: Built-in multi-layer protection prevents cell damage from over-discharging, over-charging, or short-circuit faults.
- Convenient Telemetry: 4-stage LED power meter eliminates guesswork by showing remaining battery levels clearly.
- Streamlined Prototyping: Compact board design and clear terminal markings make DIY assembly straightforward for makers and electronics hobbyists.
Applications
- DIY Portable Power Banks: Build custom mobile chargers using 18650 cells or recycled device batteries.
- Emergency Field Gear: Compact power management module for emergency backup chargers, camping kits, and travel bags.
- USB-Powered Field Electronics: Portable 5V power source for microcontrollers, Arduino builds, and portable test instruments.
- Maker & Prototyping Projects: Ideal controller board for custom battery enclosures and wearable electronics.
Package Includes
- 1 x Dual Micro USB 3.7V to 5V 2A Power Bank Charging Module
- 1 x Instruction Manual / Quick Guide
Specifications
| Parameter | Specification |
|---|---|
| Item Type | DIY Power Bank Charging & Boost Module |
| Battery Compatibility | 3.7V to 4.2V Parallel Connected Cells (18650, LiPo, Phone/Tablet Batteries) |
| Input Ports | Dual Micro-USB Charging Ports |
| Output Ports | Dual Standard USB Output Ports (Up to 5V 2A) |
| Input Voltage / Power Supply | 3.7V to 5V DC Input (Requires 5V constant voltage, 1A+) |
| Status Indicators | 4-Level LED Power Capacity Display |
| Safety Protections | Built-in Lithium Battery Protection IC (Over-Current | Overpressure | Under-Voltage) |
| Physical Dimensions (Length × Width × Height) | 68 mm × 34.5 mm × 8.5 mm |
| Net Weight / Shipping Weight | 12 g / 0.016 kg |
| Shipping Dimensions | 10 cm × 6 cm × 5 cm |
