18650 5V 2.4A Lithium Battery Digital Display, Charging Module Dual, USB Output Band, Display Booster, Module

Specification	Details
Input Interface	Micro USB / Type-C / Lightning (Varies by version)
Output Interface	Dual USB Type-A (5V 2.1A / 2.4A Shared)
Battery Voltage	3.0V – 4.2V (Single cell or Parallel pack)
Conversion Efficiency	~85% to 92%
Display Type	Blue/White Backlit LCD Digital Display
Charging Current	Up to 2.1A (Input dependent)
Protection	Overcharge, Over-discharge, Short Circuit

Price

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₹ 177.97

(Tax included)

Barcode: 33066

Product Description

The Digital Display Power Bank Module is the ideal "brain" for high-capacity battery packs where precision monitoring is required. The onboard intelligent controller automatically detects the connected device and adjusts the output current to provide the fastest possible charge. The standout feature is the LCD screen, which shows the exact battery level from 0% to 100% and indicates whether the "IN" (charging the power bank) or "OUT" (charging a device) ports are active. It also includes an onboard LED flashlight for added utility.

Key Features

Precise LCD Monitoring: Eliminates the guesswork of 4-LED indicators by showing the exact battery percentage remaining.
Synchronous Rectification: High-efficiency boost technology ensures more of your battery's energy reaches your device with minimal heat generation.
Smart IC Recognition: Automatically identifies mobile phones and tablets to deliver the optimal current up to 2.4A.
Triple Input Options: Many versions support Micro USB, Type-C, and even Lightning inputs, allowing you to charge the power bank with almost any cable you have on hand.
Full Safety Suite: Hardware-level protection prevents the batteries from reaching dangerous voltage levels or overheating during high-current sessions.

Technical Details

Dimensions: 65mm x 25mm x 8mm.
Buttons: Single press to check battery level; double-press to toggle the LED flashlight.
Battery Terminals: Large B+ and B- pads for secure soldering.

Prototyping and Engineering Tips from Robogears

Parallel Only: You can connect multiple 18650 cells to increase the "mAh" capacity, but they must be in parallel (all positives together, all negatives together). Connecting them in series will deliver 7.4V or higher, which will instantly burn out the module's IC.
The "0%" Calibration: When you first connect your batteries, the display might show an incorrect percentage. To calibrate it, perform one full charge cycle: charge the batteries to 100% until the module cuts off, then discharge them completely. The IC will "learn" the capacity of your specific cells.
Wire Gauge for 2.4A: At a 2.4A output, the current drawn from the battery can exceed 4A. Use thick, short copper wires (18-22 AWG) for the battery-to-board connection to prevent voltage drops that cause the module to shut down prematurely.
Powering Low-Current Devices: Some smart modules have an "Auto-Sleep" feature that shuts down the boost circuit if a device (like an Arduino) draws very little current (under 50mA). If your project keeps turning off, you may need to add a "dummy load" resistor.

Package Includes

1 x 18650 5V 2.4A Lithium Battery Digital Display Charging Module

Disclaimer

Double-check battery polarity before soldering. Reversing the B+ and B- connections will cause permanent damage to the charging and display controller.

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