Effest Pro C4 Battery Charger

Efest PRO C4 Smart Charger – Four-Bay Intelligent Charging with Battery Life Indicator

The Efest PRO C4 is a high-performance, four-bay universal battery charger engineered for vaping enthusiasts, flashlight users, and anyone relying on rechargeable lithium-ion cells. Combining robust construction with smart charging technology, this charger delivers reliable power management for a vast range of battery sizes while prioritizing safety and battery longevity.

Wide Battery Compatibility
The Efest PRO C4 supports an extensive list of cylindrical lithium-ion batteries, covering nearly every popular format on the market. It is fully compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 22650, 26500, and 26650. Whether you need to charge small 10440 cells for compact devices or high-capacity 26650 batteries for powerful mods, the PRO C4 handles them all with ease.

Four Independent Charging Bays
Each of the four bays operates independently, allowing you to charge different battery types and sizes simultaneously without interference. The charger delivers a consistent 1A (1000mA ±10%) constant current (CC) per channel, ensuring efficient and balanced charging. Unlike cheaper chargers that split current across bays, the Efest PRO C4 maintains full 1A output per slot, reducing total charging time for multiple cells.

Battery Life LED Indicator System
One of the standout features is the built-in Battery Life LED Indicator Light. This intuitive system does more than just show charge progress—it assesses the overall health of your battery. By analyzing internal resistance and voltage behavior during charging, the LED indicator provides a clear visual estimate of your battery’s remaining lifespan. This helps you identify aging cells that may need replacement, enhancing both safety and performance.

User-Friendly Design with Non-Slip Mat
The charger features a durable, heat-resistant housing with an integrated non-slip mat on the underside. This keeps the unit firmly in place on any flat surface, preventing accidental movement or tipping while batteries are inserted or removed. The spring-loaded sliding contacts accommodate various battery lengths securely, ensuring consistent electrical contact.

Global AC Input and DC Output
The Efest PRO C4 is designed for worldwide use, accepting AC input power of 100–240V at 50/60Hz. This means you can use it anywhere without a voltage converter. The included power adapter provides a DC output of 12V at 1A, which is safer and more stable than direct AC-to-bay charging systems, as it moves the high-voltage conversion outside the charger body.

Safety and Performance
With over-current, over-voltage, short-circuit, and reverse-polarity protection, the PRO C4 ensures peace of mind. The 1A CC current is optimized for balancing charge speed and cell health, making this charger ideal for daily use. For those seeking a reliable, bay-independent charger with battery health diagnostics, the Efest PRO C4 is a smart investment.