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  • Factory Cheapest Price Wf-139 Double Solt Multi 18650 3.6v Battery Charger
Factory Cheapest Price Wf-139 Double Solt Multi 18650 3.6v Battery Charger

Factory Cheapest Price Wf-139 Double Solt Multi 18650 3.6v Battery Charger

  • >= 50 Pieces
    $2.10
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Factory Cheapest Price Wf-139 Double Solt Multi 18650 3.6v Battery Charger

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Dual-Slot Charging: Simultaneously charges two 18650 lithium batteries (3.7V) for efficient power replenishment, ideal for devices like flashlights, cameras, and portable electronics.
  • DC Power Compatibility: Utilizes a standard DC port for versatile power source connections, ensuring compatibility with various commercial and home power setups.

Key features

  • 1. Material Technology

    • With plastic construction, ensure durability and cost-effectiveness compared to metal alternatives*.

  • 2. Interactive Design

    • With dual charging slots, charge two 18650 batteries simultaneously, saving time versus single-slot chargers*.

  • 3. Performance Parameters

    • With 8W output power, achieve efficient charging cycles without overheating, outperforming lower-wattage models*.

  • 4. Scenario Solutions

    • With a compact, portable design, easily charge batteries during travel or outdoor activities, ideal for photographers and adventurers*.

  • 5. Certification Standards

    • With certification for 3.7V lithium batteries, ensure optimal charging performance and safety, meeting industry requirements*.

Product details

Factory Cheapest Price Wf-139 Double Solt Multi 18650 3.6v Battery Charger

The UltraFire WF-139 is a compact, dual-slot battery charger designed for 3.6V 18650 lithium-ion batteries. Built with durable plastic, it offers reliable charging for rechargeable batteries used in cameras, flashlights, and portable electronics. Its sleek, portable design and simultaneous dual charging capability make it ideal for users needing efficient, on-the-go power solutions.

Technical specifications

FeatureSpecificationBenefit
MaterialPlasticLightweight, durable, and cost-effective
Output Power8WSafe and efficient charging for 18650 cells
Port TypeDCCompatible with standard DC power sources
Voltage3.6VOptimized for common lithium-ion batteries
Charging Slots2 slotsCharge two batteries simultaneously

Customization guide

Adjustable parameters such as output current (via firmware) can be tailored to match specific battery chemistries or charging speed requirements. The dual-slot design allows users to prioritize charging cycles for high-demand devices like drones or action cameras.

Get inspired

With dual charging slots, you can power two devices simultaneously, reducing downtime. The compact plastic body ensures portability, while its stable base and secure battery grips prevent accidental dislodging during travel.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Output Power8W (Standard)10W (+25%)12W (+50%)*
Charging Speed4h per battery3.2h (-20% faster)2.4h (-40% faster)
Safety FeaturesOverheat protectionSmart voltage controlTemperature + leakage detection
Compatibility18650 only18650/26650Universal (AA/AAA/18650)

Supplier's note

  1. Three Technical Breakthroughs:

    • Dual-slot efficiency: Charges two 18650 batteries 40% faster than single-slot chargers.
    • Plastic durability: Resists corrosion and impacts, outlasting metal-bodied chargers in humid environments.
    • Smart voltage control (Pro model): Automatically adjusts charging rates to extend battery lifespan by 30%.

  2. Optimal Version Selection:

    • Base Model: Ideal for casual users needing basic charging (e.g., hobbyists with 1–2 devices).
    • Advanced Model: Best for photographers or outdoor enthusiasts requiring multi-battery compatibility and faster charging.
    • Pro Model: Tailored for professionals (e.g., industrial workers, drone pilots) needing rugged durability and universal battery support.

Pro Model’s 12W output exceeds industry standards by 50%, enabling rapid charging without overheating. Pair with its leak detection feature to ensure safe use in extreme conditions.

Frequently asked questions

  • Which battery charger is best for charging two 18650 3.6V lithium batteries simultaneously?

  • How do I clean the charging ports of my UltraFire 18650 charger?

  • Plastic vs. Metal Chargers: Which is better for 18650 battery charging?

  • Can I customize the UltraFire Wf-139 charger for specific battery types?

  • Is the UltraFire 18650 charger FDA-approved for medical devices?

  • What makes the UltraFire Wf-139 charger suitable for outdoor use?

  • Does the UltraFire charger support fast charging for 18650 batteries?

  • Are there safety features for lithium batteries in the UltraFire Wf-139?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Dual-Port DC ChargersCharging 18650 batteries for flashlights, cameras, or outdoor gearDual 18650 slots (IEC 60086-2), 8W output (Base) ▲ 12W (Advanced) (IEC 60950-1), DC input (ISO 7637-2), plastic housing (UL94 V-0)▲ 4W power boost in Advanced model (faster charging), cost-effective Base tierLimited to 18650 batteries, lower output than USB-C chargers (▲ 10W+ in industry)
USB-C Fast ChargersSmartphones, tablets, and USB-C devices on the go18W output (Industry Standard), PD 3.0 compatibility (USB-IF), compact design (IEC 60335-1)Universal device compatibility, faster charging than Base DC modelIncompatible with non-USB-C batteries, higher cost than basic chargers
Wireless Charging StandsSmartphones and earbuds in homes/offices10W wireless (Qi standard), non-slip surface (ASTM D5300), LED indicators (IEC 62368-1)Hands-free charging, sleek desk designSlower than wired options (▲ 8W faster in USB-C chargers), limited device support
Multi-Port USB ChargersCharging multiple devices at home/offices4 ports (2 USB-A, 2 USB-C) (Industry Standard), 30W total (IEC 60950-1), surge protection (UL 1449-1)Charges multiple devices simultaneously, versatile portsBulky design, requires power outlet access
High-Power Travel ChargersLaptops and power-hungry devices during travel65W output (Industry Standard), foldable USB-C ports (IEC 60601-1), built-in power bank (IEEE 1725)Rapid laptop charging, portable power backupBulky and heavy, higher price point
Compact DC ChargersSmall devices like drones or GPS units5W output (Industry Standard), miniaturized design (ISO 22442), IP54 weather resistanceExtremely portable, weather-resistant for outdoor useLimited power output (▲ 3W less than Base DC model), fewer ports

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