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

The Efest PRO C4 is a high-performance, four-slot universal battery charger designed for vaping enthusiasts, flashlight users, and anyone who depends on rechargeable lithium-ion cells. Built with durable construction and advanced charging intelligence, this unit delivers dependable power management for a wide variety of battery sizes, emphasizing safety and extended cell life.

Broad Battery Compatibility
The Efest PRO C4 works with an extensive range of cylindrical lithium-ion batteries, covering nearly all common formats available today. 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 gadgets or high-capacity 26650 batteries for powerful mods, the PRO C4 handles everything effortlessly.

Four Independent Charging Slots
Each of the four slots functions independently, allowing you to charge different battery types and sizes at the same time without any interference. The charger provides a steady 1A (1000mA ±10%) constant current (CC) per channel, ensuring efficient and even charging. Unlike lower-quality chargers that divide current across slots, the Efest PRO C4 delivers the full 1A per bay, cutting down total charging time for multiple cells.

Battery Life LED Indicator System
A standout feature is the built-in Battery Life LED Indicator Light. This intuitive system does more than just display charge progress—it evaluates the overall condition of your battery. By analyzing internal resistance and voltage patterns during charging, the LED indicator gives a clear visual estimate of how much usable life remains. This helps you spot aging cells that may need replacement, improving both safety and performance.

User-Friendly Design with Non-Slip Base
The charger comes in a sturdy, heat-resistant shell with an integrated non-slip pad on the bottom. This keeps the unit firmly planted on any flat surface, preventing unwanted movement or tipping while inserting or removing batteries. The spring-loaded sliding contacts securely fit various battery lengths, ensuring reliable electrical connection every time.

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

Safety and Performance
Equipped with over-current, over-voltage, short-circuit, and reverse-polarity protection, the PRO C4 offers complete peace of mind. The 1A constant current is carefully chosen to balance charging speed with cell health, making this charger ideal for daily use. If you're looking for a reliable, slot-independent charger with built-in battery health diagnostics, the Efest PRO C4 is a smart choice.

Effest Pro C4 Battery Charger