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

2X 18650 5V 1A USB Power Bank Battery Charger Case is a solderless DIY dual-slot portable charger enclosure kit that converts one or two standard flat-top 18650 lithium-ion cells into a 5V 1A USB power bank with an integrated LED flashlight. Equipped with a pre-installed charge/discharge management PCB, nickel-plated parallel spring battery contacts, a Micro-USB charging input, and a USB Type-A output port, it allows instant assembly without soldering or spot welding.

Key Features:

• Dual Parallel 18650 Battery Bay: Accepts 1 or 2 flat-top 3.7V 18650 lithium-ion cells in parallel, doubling runtime capacity while operating safely even with a single cell installed.
• Integrated 5V 1A Charge & Boost Circuit: Built-in power bank controller manages 4.2V CC/CV charging via Micro-USB and provides a regulated 5V 1A DC output via USB Type-A.
• Built-In Emergency LED Flashlight: Includes a high-brightness white LED torch positioned between the USB ports, toggled by double-clicking or long-pressing the side power button.
• Comprehensive Battery Protection: Protects installed 18650 cells against overcharge (>4.2V), over-discharge (<2.9V), output overload, and short circuits.
• Tool-Free Spring Contact Installation: Heavy-duty nickel-plated steel springs hold cells firmly in place inside the impact-resistant ABS shell.

Technical Specifications:

• Compatible Battery Type: 1× or 2× 18650 3.7V Li-Ion Cells (Flat-Top Unprotected, Parallel Connection — Batteries Not Included)
• Charging Input Port: Micro-USB Female (5V DC / 1A)
• Discharging Output Port: USB Type-A Female (5V DC / 1A Regulated)
• Conversion Efficiency: ~85%
• Auxiliary Function: Onboard White LED Flashlight + Status Indicator LEDs
• Operating Temperature Range: -10°C to +45°C

Mechanical Specifications:

• Enclosure Material: High-Impact Matte ABS Plastic
• Closure Mechanism: Snap-Fit Top Shell Cover
• Battery Terminals: Parallel Nickel-Plated Spring Contacts (Observe +/- Markings Strictly)

Dimensions:

• Length: 98 mm
• Width: 45 mm
• Height: 22 mm
• Weight: ~38 g (Enclosure + PCB, without batteries)

Pinout and Wiring:

• Battery Bay (+ / -): Insert 1 or 2 flat-top 18650 cells matching the molded (+) and (-) polarity markings inside the tray (flat negative end against the coil springs). Warning: Reversing battery polarity will immediately damage the protection IC.
• Micro-USB Port (IN): Connect to a 5V USB wall charger to recharge the installed 18650 cells.
• USB Type-A Port (OUT): Connect smartphones, ESP32/Arduino boards, or 5V USB gadgets.
• Side Button: Single click to activate 5V output; double-click or long-press to turn the LED flashlight ON/OFF.

Datasheet Reference:

• Controller Architecture: Integrated 1A Linear Li-Ion Charger + 5V 1A Synchronous Step-Up Converter SoC (FM6316 / IP5306 class)
• Assembly Precaution: Test charging and USB output before snapping the top lid completely shut, as the snap-fit latches lock tightly once closed.

Commonly Used in:

• DIY Smartphone and Wearable Emergency Backup Chargers
• Portable 5V Power Supplies for Arduino, ESP8266, and ESP32 IoT Nodes
• Repurposing Harvested Laptop 18650 Lithium-Ion Cells
• Camping, Travel, and Glove-Box Emergency Flashlights

Applications:

• Gives second life to healthy 18650 cells recovered from old laptop battery packs by turning them into a pocket 5V USB charger.
• Provides an enclosed, rechargeable 5V DC power source for field-deployed microcontroller sensors and USB-powered instruments.
• Combines backup phone charging with a handy pocket LED torch for power outages and outdoor excursions.

Equivalent Models:

• 5V USB Plastic Body Power Bank Case for 18650 Battery: Single-cell (1× 18650) compact plastic DIY power bank enclosure kit.
• 5V USB Aluminium Body Power Bank Case for 18650 Battery: Single-cell anodized aluminum shell DIY power bank kit.

Package Includes:

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