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. It’s ideal for underwater video lights and torches that specify a 21700 battery, delivering long runtimes in a compact, travel-friendly format.

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. Ø21 × 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 40–70% charge if unused for long periods.

What’s Included

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

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