21-Cell 18650 Lithium-Ion Battery Pack with Digital Level Indicator, Dual USB Output & Switch – Green

Specifications:

1. Battery Type: 18650 Lithium-Ion (21 pcs included)
2. Output Ports: 2 x USB (5V Buck Converter Female)
3. Input Port: DC Jack Charging Input (12.6V recommended)
4. Battery Monitor: Digital voltage & capacity display
5. Switch: On/Off rocker switch
6. Capacity: Approx. 14,000mAh (2000mAh x 21 cells)
7. Output Voltage: 5V (USB)
8. Output Current: Up to 2A per USB port
9. Enclosure: Durable Green ABS plastic box
10. Dimensions: Approx. 18cm x 9cm x 8cm | Weight: ~980g

Components Price:

Battery 21x105=2205tk

Box. =400tk

40a bms = 140tk

Level. =250tk

2 usb = 250tk

Port/ switch =. 30tk

Service charge= 200tk

________________________

Total =3475tk

Description:

This custom-built 18650 lithium-ion battery pack features 21 high-capacity cells in a compact, green ABS case. Equipped with a digital battery level monitor, dual USB 5V output ports using buck converters, and a master on/off switch, it is ideal for powering and charging USB devices on the go. The integrated storage box offers protection and portability, making it perfect for DIYers, field technicians, and power users needing a robust portable power source.

Applications:

1. Power bank for phones, tablets, routers
2. Backup power for Arduino, Raspberry Pi, and other electronics
3. Emergency power supply during outages
4. On-the-go power for portable gadgets and tools
5. DIY solar or off-grid energy storage setups