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Advanced Battery Technology for Tomorrow

Premium 18650, 21700, LiFePO4 battery cells, packs, and power solutions engineered for e-bikes, drones, solar storage, and industrial applications. Trusted globally since 2009.

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Shenzhen Yi Fang Technology Co., Ltd.

Founded in 2009, Shenzhen Yi Fang Technology is a high-tech enterprise specializing in the research, development, and manufacturing of advanced battery technologies. We are a trusted OEM/ODM partner for global brands in North America, Europe, Oceania, and Asia.

Our product portfolio includes Li-ion rechargeable batteries (LiMn/IMR), Nickel Metal Hydride (Ni-MH), LiFePO4 batteries, battery chargers, power banks, and complete power solutions for a wide range of applications.

2009

Founded

50+

Countries Served

15+

Years Experience

EIZFAN

USA Registered Brand

Yifang Power Battery Technology

Our Products

High-performance battery cells, packs, and power solutions engineered for reliability, safety, and long cycle life across diverse applications.

18650 Battery

Efan 18650 Battery

High-drain rechargeable lithium-ion cells with superior cycle life and thermal stability. Ideal for flashlights, power tools, and custom packs.

  • • 3.7V Nominal Voltage
  • • 2000-3500mAh Capacity
  • • 10A Continuous Discharge
  • • RoHS & CE Certified
21700 Battery

21700 Rechargeable Li-Ion

Next-generation high-capacity cells offering improved energy density and lower internal resistance for demanding applications.

  • • 3.7V / 4.2V Max
  • • 4000-5000mAh Capacity
  • • 25A-45A High Discharge
  • • Samsung & Custom EIZFAN
E-bike Battery

48V E-bike Battery Pack

Silver Fish series high-performance packs for electric bicycles with capacities from 6Ah to 30Ah and BMS protection.

  • • 48V System Voltage
  • • 6Ah to 30Ah Configurations
  • • Built-in BMS & Connectors
  • • Customizable Dimensions
RC Drone Battery

RC/FPV Drone Battery

High-C rate LiPo batteries for UAVs, combat drones, and FPV racing with exceptional power delivery and lightweight design.

  • • 11.1V 3S & 22.2V 6S
  • • 5000-7000mAh Capacity
  • • 60C-75C Discharge Rate
  • • XT60/Deans Connectors
LiFePO4 Battery

5kWh LiFePO4 Solar Storage

Stackable 51.2V 100Ah home energy storage system with long cycle life and integrated BMS for solar and backup power.

  • • 51.2V 100Ah (5.12kWh)
  • • >3000 Cycle Life
  • • Stacked Design
  • • CAN/RS485 Communication
Power Bank

High-Capacity Power Bank

Premium backup power for smartphones and devices with fast charging, multiple outputs, and durable construction.

  • • 10000-20000mAh
  • • QC3.0 & PD Charging
  • • Dual USB + USB-C
  • • LED Capacity Display
Smart Charger

Smart LCD Battery Charger

Advanced multi-slot charger with LCD display, automatic detection, and protection for 18650, 21700, and other Li-ion cells.

  • • 2-4 Channel Options
  • • LCD Voltage/Current Display
  • • Overcharge & Short Protection
  • • USB & DC Input
Battery Pack

Custom 18650/21700 Packs

OEM/ODM battery pack assembly with custom configurations, wiring, connectors, and BMS for industrial and consumer devices.

  • • Series/Parallel Configs
  • • Custom BMS Integration
  • • JST, XT, Anderson Connectors
  • • Prototyping & Mass Production
Request Custom Solution

Power Solutions

Tailored battery systems for diverse industries, from consumer electronics to renewable energy and industrial automation.

E-Bike & Mobility

48V packs with high capacity and BMS for electric bicycles, scooters, and personal mobility devices.

Solar & Home Storage

LiFePO4 battery systems for solar energy storage, backup power, and off-grid applications.

Drones & UAVs

High-C rate LiPo and Li-ion packs for FPV, racing, and industrial drones with long flight times.

Power Tools

Durable 18650/21700 packs for cordless drills, saws, and outdoor equipment with high power output.

E-Cigarettes

High-drain 18650 cells optimized for vaping devices with safety and consistent performance.

Lighting & Flashlights

Reliable power for tactical, camping, and emergency lighting with long runtime and durability.

Toys & Consumer Electronics

Custom battery solutions for RC cars, robots, and electronic gadgets with safety certifications.

Global Certifications

Our products meet international safety and environmental standards, ensuring quality and compliance for global markets.

CE Certified

European Conformity

RoHS Compliant

Restriction of Hazardous Substances

EIZFAN Brand

USA Registered Trademark

Quality Assurance

Every battery and charger undergoes rigorous testing for voltage consistency, internal resistance, cycle life, and safety performance. Our production lines follow strict quality control protocols to ensure every product meets or exceeds industry standards.

Frequently Asked Questions

What are the hazards of lithium battery pressure difference?

Voltage imbalance between cells in a battery pack can lead to overcharging, overheating, reduced cycle life, and potential safety risks. Our BMS systems actively monitor and balance cell voltages to prevent these issues.

Which is better: Polymer lithium battery or 18650?

18650 cylindrical cells offer higher energy density, better thermal management, and longer cycle life compared to most polymer (pouch) batteries. They are more durable and suitable for high-drain applications.

What's the difference between a lithium battery pack and a ternary battery?

"Lithium battery pack" refers to the assembled unit, while "ternary battery" describes the cathode chemistry (Nickel-Cobalt-Manganese). Our packs use various chemistries including ternary NCM, LFP, and IMR based on application needs.

Do you offer custom battery solutions?

Yes, we specialize in OEM/ODM custom battery packs and power solutions. Share your voltage, capacity, size, and connector requirements for a tailored quote.

What is your minimum order quantity?

MOQ varies by product. For standard cells, it's typically 100 pieces. For custom packs, MOQ starts at 500 units. Contact us for specific requirements.

Get in Touch

Ready to power your product? Contact our team for quotes, samples, and technical support.

Contact Information

[email protected]
+86 755 2320 7001
Room 306/308, Hehuan Business Center, Bldg. 36, Yintian Ind. Zone, Baoan, Xin'an Street, Baoan Dist., Shenzhen, Guangdong, China

Request a Quote

For fastest response, contact our sales team directly:

3211097133 / 3547558500
yfsales9 / efan.sales5
+86 138 2317 1581 / +86 139 2740 7832
[email protected]
[email protected]
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