USA Deal: Efest Luc V4 Charger $15.88 
Use exclusive coupon 30CVD at checkout (Click code to copy)
Secure the Efest LUC V4 Smart Charger for an unbeatable price of just $15.88, a great discount compared to the $35.00 MSRP. This item is on sale with the provided exclusive coupon code.
You can lock in this deal for USA shipping through a highly trusted merchant we have personally vetted for many years. Our long-term relationship ensures you are guaranteed to receive an authentic Efest charger, and that you are buying from a reliable vendor with fast USA shipping.
This offer was manually verified by our deals team on November 10, 2025 and won’t expire anytime soon.
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Efest LUC V4: Independent Bays and Comprehensive Safety
The Efest LUC V4 Universal Battery is a charger engineered for the serious user who demands precision, speed, and versatility. It features four independent charging bays with sophisticated, adjustable control, allowing users to select charging rates of 0.5A, 1.0A, or a rapid 2.0A (in two bays) to perfectly match their battery type and need. Its core strength lies in its high-definition LCD screen, which provides real-time voltage and charging data for each cell, maximizing battery life and safety. Furthermore, the inclusion of the DC car adapter and a USB output transforms the LUC V4 into a portable power station and a crucial travel companion for all your 3.7V batteries.
Assessment: Advantages and Critical Limitations
- Pro: Features four fully independent charging bays, allowing for simultaneous charging of different battery types and sizes.
- Pro: Includes three selectable charging rates (0.5A, 1.0A, 2.0A) for controlled, healthy charging or rapid recovery when needed.
- Pro: Functions as a portable power bank via a 1.0A USB output (using one charged battery), allowing users to charge phones or other devices on the go.
- Pro: Ships with the essential DC car charger adapter, making it a perfect solution for charging on the road or while traveling.
- Con: The charger is an older model and does not support the larger 20700 or 21700 battery sizes, limiting its use to 26650, 18650, and smaller cells.
- Con: Uses the older LCD screen technology, which is clear but lacks the vibrant color displays of newer, premium chargers.
Quick Reference: Full Specifications and Safety Protocols
- Independent 4-Bay Control: Each of the four bays operates completely independently, supporting a wide range of cylindrical Li-ion batteries from the smallest 10440 up to the large 26650 cells.
- High-Detail LCD: Features a clear HD LCD screen that displays the real-time voltage, amperage, and charging status for all four batteries simultaneously.
- Flexible Output: Allows for charging four batteries at 0.5A, four batteries at 1.0A, or two batteries at a rapid 2.0A (in the center slots) for optimal efficiency.
- On-the-Go Power: Includes an integrated 1A USB output port that, when powered by a charged battery, converts the charger into a functional power bank.
- Automatic Shut-off: Features an accurate auto-cutoff voltage, preventing overcharging to maximize cell lifespan.
- Zero Voltage Activation: Can safely reactivate (wake up) fully depleted batteries that have dropped below their typical activation voltage.
- Comprehensive Safety: Built-in safeguards include Reverse Polarity Protection, Short-Circuit Protection, and Over-Charge Protection, ensuring the safest possible charging environment.
- Dual Input Power: Supports standard AC 100V-240V wall power and DC 12V car charging (adapter included) for maximum convenience.
⚠️ IMPORTANT PURCHASE INFO
This charger has a critical limitations that you must be aware of: the charger does not support the larger 20700 and 21700 batteries that are common in newer mods.
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