Weefine Li-Ion 21700 Battery

Weefine WBL-12C 21700 5000mAh USB-C Rechargeable Battery

The WBL-12C is a high-capacity 21700 Li-ion cell with a built-in USB-C charging port. Its ideal for underwater video lights and torches that specify a 21700 battery, delivering long runtimes in a compact, travel-friendly format.

Lithium-Ion Battery Shipping Information

Due to domestic and international dangerous goods regulations, standalone lithium-ion batteries cannot be transported via air freight.

Lithium-ion batteries may be shipped via road freight, subject to applicable transport regulations.

Lithium-ion batteries can be transported by air freight when supplied with, or installed in, the equipment they are designed to power, such as cameras, torches, video lights, strobes, and other electronic devices.

Key Highlights

• 5000mAh capacity for extended runtime
• USB-C port on the cell for direct charging (no separate charger required)
• 3.6V / 18.0Wh energy rating
• Button-top 21700 form factor for broad device compatibility
• Built for high discharge performance suitable for video lights/flashlights

Specifications

Model

WBL-12C

Cell Size

21700 (approx. 21 70 mm)

Capacity

5000 mAh

Nominal Voltage

3.6 V

Energy

18.0 Wh

Charging

USB-C (use a standard 5V USB power source)

Terminal

Button-top

Compatibility

For devices that accept a single 21700 Li-ion battery. Always verify your light/torch specifications (size, terminal type, and voltage) before use.

Charging & Care

• Charge via the integrated USB-C port using a quality USB power adapter.
• Do not leave charging unattended; disconnect when fully charged.
• Keep contacts clean and dry; rinse/fully dry after marine use before charging.
• Store around 4070% charge if unused for long periods.

Whats Included

• WBL-12C 21700 5000mAh USB-C Rechargeable Battery

Note: USB-C cable not included unless specified by your retailer/device kit.