2-Way 18650 Battery Holder

This 2-way 18650 battery holder is easy to use and can accommodate two 18650 batteries.

It features two charging input ports, micro-USB and USB-C, and two output ports: USB interface output and port output.

It supports 5V/2A and 3.3V/1A output, with five 5V output ports, five 3.3V output ports, and one USB output (5V).

The module has overcharge and over-discharge protection to effectively prolong the lifespan of the 18650 batteries. This new version also includes battery reverse connection protection and an acrylic bottom board.

The reverse connection protection prevents the module from being damaged due to battery reverse connection, and the acrylic bottom board prevents short circuit and damage caused by improper use or placement.

Combining with 18650 batteries, this module provides a convenient power supply for micro-devices and can be used for outdoor devices or DIY as a mobile power source for smart cars.

This battery holder can be used as a power source for microcontrollers, outdoor equipment and other low-power devices.

Note: The maximum current is 3A (however 3A should be considered a temporary peak current only), the output also depends on the quality of the 18650 battery. Avoid using batteries from different brands and try to ensure that the voltage of the two batteries is similar.

Interface

The module is controlled by buttons. Pressing the button lightly will turn it on. In the on state, pressing the button twice within 1 second will turn it off.

The DIP switch can be used to switch between HOLD mode and NORMAL mode. In NORMAL mode, the module will automatically shut down if the output current is too low. In HOLD mode, it will continue to output until the over-discharge protection is triggered.

LED1, LED2, LED3, and LED4 indicate the current battery level. They will flash when charging and stop flashing when the battery is fully charged.

LED light status indication

Discharging

Battery Level	LED1	LED2	LED3	LED4
0%~25%	ON	OFF	OFF	OFF
26%~50%	ON	ON	OFF	OFF
51%~75%	ON	ON	ON	OFF
76%~100%	ON	ON	ON	ON

Charging

Battery Level	LED1	LED2	LED3	LED4
0%~25%	blinking	OFF	OFF	OFF
26%~50%	ON	blinking	OFF	OFF
51%~75%	ON	ON	blinking	OFF
76%~100%	ON	ON	ON	blinking

Specifications

• Output current: 5V/2A, maximum peak support 3A; 3.3V/1A
• Protection: with overcharge and over-discharge protection
• NEW! Reverse-polarity protection
• NEW! Acrylic base
• Input: Micro-USB and USB-C input
• Output:
  • USB output x1
  • 3.3V output port x5
  • 5V output port x5
• LED indicator (blinking means charging, stop blinking means fully charged)

Package Contents

• 1x 2-Way 18650 Battery Holder

Batteries not included

Revision History

As of 23/04/2025 – we are stocking the updated version with reverse-polarity/reverse connection protection and an acrylic base.