18650 Battery Holder V3 Development Board Compatible with Raspberry Pi

18650 Battery Holder V3 Development Board Compatible with Raspberry Pi (18650 Battery Shield V3) is a compact single-cell 18650 lithium battery holder and dual-rail (5V & 3V) DC power expansion module designed for Raspberry Pi, ESP32, ESP8266, and Arduino portable electronics. Combining a single SMD 18650 battery cradle, a Micro-USB 5V 0.5A–1A charging circuit, a full-size USB Type-A 5V output port, a power switch, and breakout header pads for both 5V and 3V rails on a 92mm × 29mm PCB, it provides a self-contained rechargeable power subsystem.

Key Features:

• Single 18650 Holder + Power Management PCB: Integrates the mechanical 18650 cell holder, lithium charger, battery protection, 5V step-up converter, and 3V LDO regulator on one slim board.
• Simultaneous 5V & 3V Breakout Headers: Includes multiple labeled 5V/GND (up to 2A–3A peak) and 3V/GND (up to 1A) solder/pin header pads along both long edges.
• USB Type-A Output + Micro-USB Charging Input: Powers Raspberry Pi or Arduino boards directly via a standard USB cable while recharging from any 5V Micro-USB adapter.
• Overcharge & Over-Discharge Protection: Built-in DW01A + MOSFET protection circuit prevents cell overcharging (>4.2V) and deep discharge (<2.9V).
• Onboard Output Switch & Charge LEDs: Slide switch cuts off output power cleanly, while red and green indicator LEDs show charging progress.

Technical Specifications:

• Model: 18650 Battery Shield V3 (Single-Cell Version)
• Compatible Battery: 1 × 18650 3.7V Unprotected Flat-Top Li-Ion Cell (Not Included)
• Charging Input: 5.0V DC / 0.5A–1.0A (via Micro-USB Female Port)
• 5V Output Rail: 5.0V DC Rated 1.0A–2.0A Continuous (via USB-A Socket & 3 × 5V Header Pairs)
• 3V Output Rail: 3.0V–3.3V DC Rated 1.0A Max (via 3 × 3V Header Pairs)
• Protection Features: Overcharge, Over-Discharge, and Short-Circuit Protection (Observe battery polarity strictly)

Mechanical Specifications:

• PCB Material: FR-4 Double-Sided Fiberglass Board
• Battery Cradle: Single SMD 18650 Plastic Holder with Spring Contacts
• Mounting: 4 × Corner Mounting Holes

Dimensions:

• Length: 92 mm
• Width: 29 mm
• Height: 23 mm
• Weight: ~30 g (Without battery)

Pinout and Wiring:

• 18650 Battery Cradle (+ / -): Insert one 18650 cell matching the silkscreen (+) and (-) markings on the PCB. Warning: Reversing battery polarity will destroy the charging chip.
• 5V / GND Header Pads: 3 pairs of through-hole pads providing regulated +5V DC.
• 3V / GND Header Pads: 3 pairs of through-hole pads providing regulated +3V/+3.3V DC.
• USB Type-A Port: Regulated +5V DC output to Raspberry Pi, ESP32, or Arduino.

Datasheet Reference:

• Architecture: TP4056 Linear Charger + 5V Synchronous Boost Converter + 3.3V LDO Regulator

Commonly Used in:

• Raspberry Pi Zero / 3B / Pico Portable Battery Supplies
• ESP32-CAM, NodeMCU ESP8266, and Arduino Handheld Projects
• Compact Wireless Sensor & Telemetry Enclosures
• Cordless Breadboard Power Supplies

Applications:

• Converts a single 18650 battery into a rechargeable dual-rail (5V and 3.3V) power supply for Raspberry Pi Zero, ESP32, and Arduino boards.
• Eliminates external wiring between separate battery holders, TP4056 chargers, and boost converters.
• Provides convenient USB Type-A power output alongside solderable 5V and 3V pin headers.

Equivalent Models:

• Dual 18650 Lithium Battery Shield V8 Expansion Board Module: Dual-cell (2× 18650) V8 version for double battery capacity.
• 5V USB Plastic Body Power Bank Case for 18650 Battery: Enclosed single-18650 USB power bank shell.

Package Includes:

• 1 × 18650 Battery Holder V3 Development Board Compatible with Raspberry Pi