Description
Experience cutting-edge charging technology with the Efest SLIM K4 Type C USB Charger, designed to cater to modern energy needs with precision and efficiency. This charger offers a sleek, USB-powered design with a Type-C port, facilitating faster and more reliable connection. It supports a variety of 3.6V/3.7V lithium batteries and intelligently auto-detects the optimal charging current for up to four batteries, enhancing battery life and performance. With advanced features like reverse polarity protection and automatic charge completion detection, the SLIM K4 ensures your batteries are charged safely without the risk of overcharging. Backed by a three-year warranty, this charger combines durability with high performance, making it an ideal choice for tech-savvy users.
Compatible with: Ultra-compatible with a variety of 3.6V/3.7V Lithium batteries – 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650
Technical Info:
- Flexible Charging Options: Auto-detects and adjusts charging current offering 2x1.0A, 1x1.0A, 4x0.5A, and 3x0.5A configurations to suit different battery capacities and sizes.
- Type-C USB Port: Modern Type-C USB port for more efficient power input and stability, ensuring faster charging speeds and reliable operation.
- LED Charging Indicators: Equipped with clear LED indicators that provide real-time feedback on battery charging status, simplifying power management.
- Comprehensive Safety Features: Features robust reverse polarity protection and automatic shutdown upon charge completion to prevent overcharging and extend battery life.
- Wide Compatibility: Ultra-compatible with a broad range of lithium ion IMR batteries, including popular sizes such as 18650, 20700, and 21700, as well as smaller formats like 10440 and 14500.
Compatible with: Ultra-compatible with a variety of 3.6V/3.7V Lithium batteries – 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650Technical Info:
- Input – AC 100V-240V 50/60Hz or DC 5V 2A
- Output – 4.2V +/-.05V
- Battery Output Cutoff Voltage : 4.20V ± 0.05V
- Auto Recharge Voltage: 4.10V ± 0.10V
- SIZE/TYPE COMPATIBILITY - ✔ 18650 ✔ 20700 ✔ 21700
- 18650
- Efest SLIM K4 LED battery charger
- USB cable
- User Manual and warranty card
- Scratch-off validation serial number
⚠ Important Safety Warnings
Improper use of a battery charger can result in overcharging, short circuits, or damage to the battery, causing FIRE, EXPLOSION, or ELECTRICAL SHOCK. Users must follow all safety guidelines to ensure proper operation. Click here to review the full safety guidelines.
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Device Compatibility:
- Use the charger only for compatible battery types and sizes as specified by the charger manufacturer. Ensure the charger is appropriate for the battery chemistry, size, and protection status (e.g., unprotected or protected cells).
- Do not charge non-rechargeable batteries (e.g., alkaline or primary cells).
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Proper Use:
- Only charge batteries in a fireproof or non-flammable area. Avoid charging on beds, couches, or other flammable surfaces.
- Do not force a battery into the charger slot if it does not fit properly. This can damage the charger or battery and may result in unsafe charging conditions.
- Inspect batteries before charging: Do not charge if the battery casing, wrapper, or terminals are damaged, dented, leaking, or bulging.
- Never leave batteries unattended while charging. Monitor the charging process, and unplug the charger when charging is complete.
- Avoid exposing the charger to liquids, high heat, or direct sunlight.
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Inspection:
- Do not use the charger if the power cord, plug, or device is damaged.
- Inspect both the charger and the battery for any signs of damage before use.
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Storage & Handling:
- Keep the charger away from children and pets.
- When not in use, unplug the charger and store it in a cool, dry place.
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Prohibited Activities:
- Do not modify or disassemble the charger.
- Do not attempt to repair a damaged charger—replace it with a new one.
- Avoid using extension cords or adapters that exceed the manufacturer’s recommendations.
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Emergency Response:
- If the charger or battery emits smoke, sparks, or a burning smell, disconnect the power immediately and move the battery and charger to a safe area.
- In case of fire, use a Class D fire extinguisher or sand to extinguish the flames.
Disclaimer
18650Battery.com is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Battery chargers must only be used with compatible battery types and operated in accordance with manufacturer instructions. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to their customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.