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मूल्य सूची: Retail Price (B2C) मूल्य सूची
मूल्य सूची: Retail Price (B2C) मूल्य सूची
DIY 18650 Dual USB Power Bank Module with LCD Display

DIY 18650 Dual USB Power Bank Module with LCD Display

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SpecificationDetails
Input PortMicro USB / Type-C (Charging)
Output PortsDual USB Type-A (5V 1A & 5V 2.1A)
Battery Type3.7V Lithium Battery (18650 preferred)
Display TypeDigital LCD (Blue Backlight)
Charging Voltage5V DC
Conversion Efficiency85% to 90%
ProtectionOvercharge, Over-discharge, Overload
Price
₹ 177.97 ₹ 177.97
(Tax included)

Product Description

The Mobile Power Boost Module is engineered for safety and efficiency. The onboard microcontroller constantly monitors the connected battery's voltage and displays the remaining capacity as a percentage (0-100%) on the LCD screen. It features an intelligent "Auto-Detect" load system that wakes the module when a device is plugged in and enters a low-power sleep mode when idle. The dual USB outputs are labeled for different current ratings, allowing you to choose between standard 1A charging for small gadgets or 2.1A fast-charging for modern mobile devices.

Key Features

  • Intelligent Digital Display: Provides real-time feedback on battery percentage and output status (IN/OUT).

  • Dual USB Output: Supports simultaneous charging of two devices with a combined maximum output of 2.1A.

  • Comprehensive Protection: Built-in ICs prevent the lithium batteries from falling below safe voltage levels or overcharging, significantly extending battery life.

  • Compact DIY Design: Small enough to fit into 3D-printed enclosures or recycled laptop battery cases.

  • LED Flashlight Feature: Most versions include a small high-brightness LED that can be toggled as an emergency torch.

Technical Details

  • Dimensions: Approximately 65mm x 25mm.

  • Safety Feature: Independent battery protection IC (DW01 or similar).

  • Quiescent Current: Very low standby drain (<50uA).

Prototyping and Engineering Tips from Robogears

  • Polarity is Absolute: This module does not have reverse polarity protection on the battery terminals. Connecting the "B+" and "B-" wires backward, even for a millisecond, will instantly destroy the main control chip. Always double-check your connections with a multimeter before soldering.

  • Parallel Connection Only: You can connect multiple 18650 cells to increase capacity (e.g., 10,000mAh), but they must be connected in parallel (all positives together, all negatives together). Never connect batteries in series (7.4V or higher), as the module is strictly designed for a 3.7V input.

  • Thick Wiring Matters: When drawing 2.1A, thin jumper wires will cause a voltage drop, making the module think the battery is empty. Use short, thick 20 AWG to 22 AWG copper wires for the battery-to-module connections for maximum efficiency.

  • Initial Activation: After soldering the batteries for the first time, the screen might not turn on immediately. You usually need to plug in a Micro USB charger for a few seconds to "activate" the protection circuit and wake the module.

Package Includes

  • 1 x Mobile Power Boost DIY 18650 Lithium Battery Digital Dual USB Module

Disclaimer

Handling lithium-ion batteries requires extreme caution. Ensure all batteries used in a parallel pack are of the same brand, capacity, and voltage level to prevent internal overheating or fire.