Dual USB 5V 2.1A LED Lithium Battery Charger Protection Board

Dual USB 5V 2.1A Output Ports: Features two USB Type-A output ports delivering up to 2.1A total output for fast, simultaneous charging of smartphones, tablets, and portable electronics.

Integrated Backlit Digital LCD Display: Digital screen accurately displays real-time battery percentage ($0\% - 100\%$), input/output status, and active charging port connection.

Multi-Input Charging Interface: Equipped with micro-USB / Type-C input ports for convenient recharging via standard phone chargers and power adapters.

Automated BMS Safety Protection: Onboard protection IC safeguards against battery overcharging, over-discharging, overcurrent, and output short circuits to maximize battery pack longevity.

Integrated LED Flashlight: Onboard high-brightness white LED diode functions as a built-in emergency flashlight or workbench illuminator.

Board Material: High-grade FR-4 glass-reinforced epoxy PCB equipped with dual USB sockets, digital LCD display module, and power management control ICs.

Technical Specifications:

Input Voltage: 5V DC (Micro-USB / Type-C).

Output Voltage / Current: 5V DC / 2.1A Max (Dual USB Type-A ports).

Compatible Battery Chemistry: 3.7V / 4.2V 1S Li-ion / LiPo / 18650 parallel cells.

Display Type: Backlit Digital LCD Screen.

Board Color: Green PCB with metallic shielding.

Usage Advice: Connect single-cell (1 S) 3.7V lithium batteries or parallel battery banks directly to the B+ and B- solder pads, taking care to maintain correct polarity.

Maintenance: Keep the display screen and USB ports free from solder flux, metallic dust, and moisture to ensure clean connections and display clarity.

Essential DIY Power Bank Module: Position as the ultimate all-in-one charging and protection module for building custom power banks, portable emergency power kits, and mobile project enclosures.

Highlight Real-Time Telemetry & Dual Charging: Emphasize how the clear digital percentage display and dual high-current USB ports give users complete control and fast charging performance for multi-device setups.

Recommended Cross-Sell Add-ons: Pair with LCD Digital Battery Capacity Checker CellMeter 1-8S, 1S 18650 Lithium Battery Capacity Indicator Module Level Tester LED, 1S 3.7V Li-ion 1MOS 3A Battery Protection Board, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Battery Capacity and Voltage Meter collection page as your complete DIY lithium charging and display module.