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Description
Efest SLIM K4 Battery ChargerSLIM K4 Charger is a intelligent charger that with a Type C USB charging port. It is compatible with Lithium IMR 3. 6V 3. 7V batteries: 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 26500, 26650, 20700, 21700. LED indicator will show you the status of charger: indicator turns blue in standby mode full charged, white color in charging. SLIM K4 Charger is designed with some smart functions, such as auto detect charging, monitors and charges
SLIM K4 Charger is a intelligent charger that with a Type-C USB charging port. It is compatible with Lithium IMR 3.6V/3.7V batteries: 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 26500, 26650, 20700, 21700. LED indicator will show you the status of charger: indicator turns blue in standby mode/full charged, white color in charging. SLIM K4 Charger is designed with some smart functions, such as auto-detect charging, monitors and charges each slot independently, low voltage smart activation recovery function, 0V activation recovery function. Besides, it is safe for you to use with built-in intelligent protection chip.
Efest SLIM K4 Battery Charger available to order Online from Vape Gate UAE with a unique Delivery service in UAE, Abu Dhabi, Dubai, Al Ain, Ras Al Khaimah, Ajman, Sharjah, Ruwais
SLIM K4 Charger is a intelligent charger that with a Type-C USB charging port. It is compatible with Lithium IMR 3.6V/3.7V batteries: 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 26500, 26650, 20700, 21700. LED indicator will show you the status of charger: indicator turns blue in standby mode/full charged, white color in charging. SLIM K4 Charger is designed with some smart functions, such as auto-detect charging, monitors and charges each slot independently, low voltage smart activation recovery function, 0V activation recovery function. Besides, it is safe for you to use with built-in intelligent protection chip.
Efest SLIM K4 Battery Charger Specification:
| Brand | Efest |
| Product Name | SLIM K4 Charger |
| Compatible with | Lithium IMR 3.6V/3.7V batteries: 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 26500, 26650, 20700, 21700 |
| Input Power | DC 5V 2A |
| 2*1A CC Current | 2000mA±10% |
| 1*1A CC Current | 1000mA±10% |
| 4*0.5A/3*0.5A CC Current | 500mA±10% |
| Auto Cut-off Voltage | 4.20±0.05V |
| CV Cut-off Current | ＜100mA |
| Standby Current | ＜20mA |
| Activation Current | 50mA~100mA |
| Auto Recharge Voltage | 4.10±0.10V |
| Operation Temperature | 0℃~40℃ |
| Storage Temperature | ﹣40℃~+70℃ |
| Auto-detect Charging Current | 2×1.0A/1×1.0A/4×0.5A/3×0.5A |
Efest SLIM K4 Battery Charger Features:
Efest SLIM K4 Battery Charger Includes:
- Efest Slim K4 Battery Charger
- USB Cable
- User Manual
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Good Stuff!! All low speed shudder is gone.
Size: 5 Quart Jug
I have a 2020 Nissan Altima SL 2.5l and Nissan is VERY specific about using ONLY NS3 transmission fluid. There are only a couple NS3 transmission fluid manufacturers...Nissan NS3 (Manufactured by Idemitsu), Idemitsu (a little cheaper than Nissan dealer), Triax, and Mannol (works good too).
Seeing as Nissan is still using Jatco CVT transmissions which are known to be very troublesome, and very expensive to replace I wouldn't try any of the so-called "universal" transmission fluids just to save $50 and end up replacing a $6000 transmission.
The Triax fluid seems to work very good in my car. I don't feel the shutter that I normally feel when driving slow and need to accelerate. The shudder is completely gone and operating smooth.
The old fluid had 50k miles and it was very dirty but didn't smell burnt.
I ended up doing 2 - 3 1/2 quart changes with 200 miles between the first and second change.
I plan on doing another 3.5/4 quart change every 15k miles since there is no way to completely drain the 7.4 quarts of transmission fluid. The first change, only 3.5 quarts drained from the pan.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025
★★★★★ 5
Quality fluid for half cost in Mini CVT.
Size: 5 Quart Jug
Used in the cvt transmission in my 06 mini cooper. The fluid requirements recommended by BMW are met with this fluid. Fluid improved shifting and performance at half the cost of traditional BMW OEM fluid.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
This CVT Fluid worked perfectly in a 2018 Chevrolet Spark.
Size: 5 Quart Jug
This fluid is fantastic. I bought a 2018 Chevrolet Spark with 30K miles and had a bad transmission shudder. Drained the transmission, cleaned-out the pan, and replaced the filters. Old fluid was black and this is a clear green. I loved the jug as it had a pop-up spout that was small and easy to pour, and the jug has a side handle. Transmission works great and the shudder is gone. I plan to change the filters and fluid again after 1K miles. This fluid is well worth the money!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2025
★★★★★ 4
Wonderful
Size: 5 Quart Jug
Works great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 16, 2025
★★★★★ 5
Great product
Size: 5 Quart Jug
Exactly what I needed. Great price! Fits well for my vehicle.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
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