Efest Slim K1 Battery Charger

Efest Slim K1 Battery Charger

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Charge your FPV goggles and radio batteries with the simple, compact, and reliable Efest SLIM K1 charger. This single-bay USB charger is the perfect solution for pilots who need a portable and trustworthy way to charge their cylindrical Li-ion cells. It’s an essential tool for any FPV pilot’s workbench or travel bag.

Simple, Reliable Charging. The SLIM K1 is designed for straightforward operation. It provides a steady $1\text{A}$ charging current and features a simple LED indicator to show the charging status. Intelligent features like auto-detect charging and a low-voltage activation function can even help revive cells that have been over-discharged.

Built to Last Efest is known for quality, and this charger is no exception. It is constructed with a durable “piano wire” spring that provides a smooth and long-lasting sliding action for inserting and removing batteries. The chromium-plated steel cathode ensures low resistance and a more precise charging voltage, contributing to the health and longevity of your batteries.

Key Features:

• Compact & Portable: A slim, single-bay design makes it perfect for travel and field charging.
• Wide Compatibility: Charges a huge range of common 3.6V/3.7V Li-ion batteries, including 18650, 20700, 21700, and 26650.
• 1A Fast Charging: Provides a solid $1.0\text{A}$ charging current to get your batteries ready to fly.
• Comprehensive Safety Features: Includes reverse polarity, short circuit, and over-charging protection for peace of mind.
• Premium Construction: Features a high-quality piano wire spring and steel cathode for a long service life.

Compatible with: 3.6V/3.7V Lithium-ion Batteries, including:

• 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22650, 26500, 26650

Specifications:

• Input: DC $5\text{V }1\text{A}$ (via Micro USB)
• 1.0A CC Current: $1000\text{mA}\pm 10\%$
• Auto Cutoff Voltage: $4.20\text{V}\pm 0.05\text{V}$
• CV Cutoff Current: $<100\text{mA}$
• Activation Current: $50\text{mA}-100\text{mA}$
• Operation Temperature: 0∘C∼40∘C

Packaging Contents:

• 1x Efest Slim K1 Battery Charger
• 1x USB Cable
• 1x User Manual