Product Description
The TYPE-C Duplex 21700 Li-ion battery is a high-capacity rechargeable battery with a built-in USB Type-C
duplex port, enabling both charging and discharging without the
need for an external charger. Designed in the 21700 cylindrical
format, it combines compact size, strong output power, and
convenient plug-and-play operation. This smart battery solution is
ideal for modern portable electronics, outdoor gear, and emergency
backup power.
Key Advantages
- Dual Function Port – Type-C duplex interface for both charging and discharging.
- High Energy Density – Longer runtime compared to 18650 batteries.
- Convenient Charging – Direct USB-C input eliminates special chargers.
- Durable Performance – Long cycle life with stable voltage output.
- Portable & Versatile – Compact design fits a wide range of devices.
Applications
- Flashlights and headlamps
- Outdoor camping equipment
- Power banks and mini fans
- Wireless microphones and speakers
- Emergency backup power for electronics
Factory Support & Services
- OEM/ODM Customization – Capacity, voltage, and branding available.
- Engineering Expertise – 13+ years of battery R&D and production.
- 24/7 Technical Support – Professional after-sales service worldwide.
- Fast Delivery – Local warehouses and flexible shipping solutions.
- Strict Quality Control – Every unit tested before shipment.
Packaging & Shipping
- Packaging Options: Standard paper cartons or reinforced wooden boxes.
- Shipping Methods: Sea freight, air freight, or express delivery.
- Custom Packaging: Available upon request for branding or retail display.
FAQ
Q1: Can I charge the battery with a normal USB-C cable?
Yes, it supports standard USB-C cables for charging.
Q2: Does it need a special charger?
No, the duplex Type-C port allows direct charging without an
external charger.
Q3: What is the typical cycle life?
Over 500+ cycles with proper use.
Q4: Can it be customized with my logo?
Yes, Yunfan Factory provides OEM logo and capacity customization.
Q5: Is it safe for international shipping?
Yes, it complies with UN38.3 and MSDS standards for safe transport.
