2 x 18650 Lithium Battery Shield Power Expansion Board

Dual 18650 Battery Capacity: Holds two 18650 lithium-ion cells in parallel to double your overall battery capacity and significantly extend system runtime for portable prototypes.

Dual Regulated Outputs (5V & 3.3V): Features onboard step-up boost conversion delivering both regulated 5V and 3.3V DC power rails with multiple output header pins.

Integrated Micro-USB / Type-C Charging: Built-in onboard charging circuit allows safe replenishment of installed 18650 cells directly via standard USB cable.

Comprehensive Circuit Protection: Equipped with integrated protection ICs guarding against overcharge, overdischarge, short-circuit, and overcurrent conditions.

Onboard Power Switch & LED Status Indicators: Features an physical power toggle switch to control power output and LED status lights to show active charging state.

Standard 0.1" (2.54mm) Pin Headers: Breakout pin headers provide easy breadboard and jumper wire connections to microcontrollers like Arduino, ESP32, or Raspberry Pi.

Housing & PCB Style: High-quality FR-4 glass epoxy PCB with dual integrated spring-loaded 18650 cell holders.

Contact & Terminal Style: Gold-plated/nickel-plated PCB solder pads and standard male header output pins.

Technical Specifications:

Supported Cells: 2 x 18650 Rechargeable Li-Ion (Unprotected cells recommended).

Input Charging Voltage: 5V DC (via USB).

Output Voltages: 5V DC (up to 2A) and 3.3V DC (up to 1A).

Color: Black PCB with white component silkscreen and black battery holders.

Usage Advice: Pay strict attention to battery polarity indicators (+) and (-) printed on the PCB when inserting cells to avoid damaging the onboard circuitry.

Maintenance: Store in a dry, static-safe environment. Clean header contacts with isopropyl alcohol if dust accumulates.

Essential Portable Power Hub: Position as a versatile power expansion board for mobile robotics, IoT edge nodes, wireless sensor gateways, and portable Arduino or ESP32 project builds.

Highlight Dual-Voltage Versatility: Emphasize simultaneous 5V and 3.3V power rails, making it ideal for powering microcontrollers and sensors at the same time without extra voltage regulators.

Recommended Cross-Sell Add-ons: Pair with 4 x 18650 Lithium Battery Shield Power Expansion Board, ESP32S Wemos 18650 Battery Charge Board, TP4056 1A lithium charging module Type-C, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Battery Charger Module collection page under battery shield and power expansion options.