Type C Rechargeable Lithium Ion Battery 21700 3.6V 5000mAh Emergency Light Mini Fan Battery Cell

Product Description

This high-capacity 21770 lithium-ion rechargeable battery cell delivers reliable 3.6V output with an impressive 5000mAh capacity, ideal for high-drain applications. Featuring a built-in Type-C charging port, it allows direct charging without the need for a separate charger — making it more convenient and user-friendly. Designed with premium safety features, this cell offers excellent cycle life, energy density, and performance consistency.

Key Features

Model: 21770 lithium-ion battery cell

Recharge Interface: Integrated Type-C port

Charging Time: ~2–3 hours (fast charging supported)

Cycle Life: ≥1000 cycles

Discharge Rate: High-drain compatible

Protection Circuit: Built-in protection against overcharge, over-discharge, overcurrent, and short circuit

Design: Cylindrical with durable metal casing

Applications

Flashlight,Headlamp,Bike light,Emergency light,Mini-fan,Microphone,Instruments and apparatus 

Product Parameters

Packing and Shipping

Packing Details

Standard Packing Configuration:

Each cell individually packed in anti-static bags or protective sleeves

Multiple cells  placed in inner boxes with foam or cardboard separators

Outer cartons are strong, double-walled export-grade with shock-absorbing filler

Cartons labeled with battery specifications, safety symbols, and handling instructions

Bulk orders: securely stacked on wooden pallets with stretch film for added stability

Optional Packaging Services:

OEM packaging with custom logo/label

Retail-ready blister or box packaging

Barcode, QR code, or serial number labeling for inventory tracking

Shipping Information:

Shipping Methods:

Express (DHL, FedEx, UPS) – for samples or urgent orders

Air freight – for medium-volume, time-sensitive shipments

Sea freight – cost-effective option for bulk quantities

Export Documents & Certifications:

UN38.3 (transport safety certification)

MSDS (Material Safety Data Sheet)

CE, RoHS (available upon request)

Dangerous Goods Declaration (for customs and carrier compliance)

Handling Notes:

Classified as Class 9 Dangerous Goods (UN3480 – Lithium-Ion Batteries)

Compliant with IATA, IMDG, and relevant shipping regulations for lithium batteries

FAQ

1. What devices can this battery be used in?
This 21700 battery is ideal for high-drain devices such as flashlights, e-bikes, power tools, portable fans, and smart home devices. Ensure the device supports 21700 size and 3.6V input.

2. How is this battery charged?
It features a built-in Type-C charging port. Simply connect a USB-C cable to charge the battery directly—no external charger required.

3. How long does it take to fully charge?
Charging time is approximately 2 to 3 hours, depending on the charging current (recommended 5V/2A).

4. Is the battery protected?
Yes. The battery has a built-in protection circuit (PCB) for overcharge, over-discharge, overcurrent, and short-circuit protection.

5. Can I use this battery in series or parallel configurations?
For multiple-cell configurations, please consult with us to ensure electrical safety and compatibility. The built-in charging circuit may not be suitable for battery packs without adjustment.

6. What’s the difference between this and a standard 21700 cell?
Unlike standard cells, this battery features a Type-C charging port, so it doesn’t require an external charger. It is also typically slightly longer to accommodate the charging circuitry.

7. Can I order this battery with custom labels or packaging?
Yes. OEM/ODM services are available, including custom branding, capacity adjustment, and packaging design.