2X 18650 5V 1A USB Power Bank Battery Charger Case

2X 18650 5V 1A USB Power Bank Battery Charger CaseThis compact and durable 2X 18650 5V 1A USB Power Bank Battery Charger Case is a DIY solution designed to convert standard lithium-ion cells into a portable charging station. Furthermore, it features an integrated control circuit that manages both charging and discharging, consequently protecting your devices and batteries from over-voltage or short circuits. Therefore, it is an excellent choice for users looking to repurpose high-quality 18650 cells from old laptop batteries or for those building custom portable power solutions. However, users must be mindful of battery polarity during installation, as reversing the cells can damage the internal protection board. Specifically, the inclusion of a built-in LED flashlight adds utility for emergency situations or outdoor use. Moreover, the plug-and-play USB interface ensures universal compatibility with a wide range of mobile devices.

Key Features

• Dual Slot Design: Accommodates two 18650 batteries to double the capacity of a standard single-cell power bank.
• Integrated LED Flashlight: Features a small, bright LED activated by the onboard button for illumination in dark environments.
• Smart Charging Circuit: Automatically manages the 5V input to safely charge lithium cells while preventing overcharge.
• Status Indicators: Utilizes LED light prompts to display charging progress and battery status.
• Compact and Portable: The lightweight plastic shell is designed for easy transport in pockets or bags, consequently making it ideal for travel.
• Solderless Installation: Batteries are typically held by spring contacts, therefore requiring no specialized tools for assembly.

Technical Specifications

• Input Port: Micro-USB (5V / 1A).
• Output Port: USB Type-A (5V / 1A).
• Compatible Battery Type: 3.7V / 4.2V 18650 Lithium-ion (Flat top recommended).
• Charging Efficiency: ≈ 85%.
• Safety Protections: Over-discharge, over-charge, and short-circuit protection.
• Operating Temperature: −10°C to +45°C.

Mechanical Specifications

• Shell Material: High-impact ABS plastic.
• Closure Type: Snap-fit lid (Note: Some models are permanent once closed).
• Battery Contacts: Nickel-plated steel springs for low resistance.
• Surface Finish: Matte black with “POWER BANK” branding.

Dimensions

• Overall Size: ≈ 98.0 mm × 45.0 mm × 22.0 mm (L x W x H).
• Weight: ≈ 40g (Without batteries).

Pinout and Ports

• USB-A (Output): Connect your charging cable here to power smartphones, tablets, or small USB gadgets.
• Micro-USB (Input): Connect to a 5V wall adapter or computer port to charge the internal batteries.
• Power Button: Single press to check battery level; long press or double-click (depending on firmware) to toggle the LED flashlight.

Commonly Used in

• Smartphone Emergency Charging
• DIY Portable Arduino/ESP32 Power Supplies
• Camping and Outdoor Lighting
• Battery Testing and Maintenance
• Educational Electronics Kits

Applications

• Travelers use this case to maintain phone battery during long trips where wall outlets are unavailable.
• It serves as a convenient power source for testing USB-powered sensors and development boards in the field.
• Consequently, it is a favorite among hobbyists for creating custom-capacity power banks using high-performance cells.
• Furthermore, the flashlight feature makes it a useful emergency tool to keep in a vehicle glove box.
• Ultimately, it provides a sustainable way to reuse 18650 cells, reducing electronic waste.

Equivalent Models

• * Single-Slot 18650 Power Bank Case
• * Quad-Slot (4X) 18650 LCD Power Bank Module
• * TP4056 Based Lithium Charger Modules (Bare PCB version)

Package Includes

• * 2X 18650 5V 1A USB Power Bank Battery Charger Case (Batteries not included)