Overview: The TP4056 Dual USB 5V 1A Lithium Battery Charging/Discharging Module is a versatile, all-in-one power management board designed for building custom power banks or portable charging solutions using single-cell lithium-ion (Li-ion) or lithium-polymer (Li-Po) batteries (3.7V nominal). Featuring an integrated LCD display for real-time monitoring of input/output voltage and current, this compact green PCB module handles both charging (via micro-USB) and discharging (via two USB-A ports) with built-in protections. It’s perfect for DIY electronics, emergency power backups, and mobile device charging projects, offering efficient power conversion up to 90% efficiency.
Key Specifications:
Parameter
Value/Detail
Battery Configuration
1S (single 3.7V Li-ion/Li-Po cell)
Input Voltage (Charging)
5V DC via micro-USB (up to 1A)
Output Voltage
5V DC (fixed)
Output Current
1A max per USB port (total 2A shared)
Charging Current
1A max (adjustable via resistor)
Efficiency
Up to 90% (charge/discharge)
Display
LCD (shows IN/OUT voltage in V and current in A, e.g., “IN 5.0V 1.0A”)
Protection Features
– Overcharge/discharge protection (4.2V/2.5V cutoff) – Over-current/short-circuit protection – Reverse polarity protection (with diode) – Low battery indicator
Dimensions
Approx. 69mm x 23mm x 5mm
Weight
~15g
Operating Temperature
-10°C to +60°C
Connections:
Battery Input (B+/B–): Solder pads or terminals for connecting a 3.7V Li-ion/Li-Po battery (positive to B+, negative to B–; supports up to 3000mAh cells).
Charging Input: Micro-USB port for 5V input from wall adapters or computers.
Output Ports: Two USB-A female ports for discharging to devices (5V/1A each).
Power Switch: Onboard slide switch to enable/disable output.
LCD Display: Automatically updates in real-time; no additional wiring needed.
Features and Benefits:
Real-Time Monitoring: Bright LCD screen displays input/output voltage (0.00-99.9V resolution) and current (0.00-9.99A), helping users track charging status and battery health.
Dual USB Outputs: Charge two devices simultaneously with intelligent power allocation for balanced load distribution.
Efficient Charging: TP4056 IC provides constant-current/constant-voltage (CC/CV) charging to safely top up batteries without overheat or damage.
Compact DIY-Friendly: Pre-assembled board with solder points for easy battery integration; ideal for custom power banks or solar chargers.
Safety First: Comprehensive protections prevent common Li-battery hazards like explosions or fires; auto-restart after faults.
Versatile Use: Supports pass-through charging (charge battery while powering devices) for uninterrupted operation.
Applications:
DIY power banks for smartphones, tablets, or cameras.
Portable solar charging stations.
Emergency backup for Raspberry Pi or Arduino projects.
Field electronics like drones or RC toys.
Custom wearable or gadget power supplies.
Note: Use only compatible 3.7V rechargeable Li-ion/Li-Po cells; do not exceed 1A per port to avoid overheating.
