SKU: 60681220933

Efest Slim K2 Battery Charger

Sale price$9.86 Regular price$10.95
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

Efest Slim K2 Battery ChargerThe Efest SLIM K2 Two Slot Battery Charger is a dual slotted battery charger, designed to charge high amp battery cells in a quick and rapid fashion. Integrating intelligent battery detection, the SLIM K2 will start charging batteries within seconds of contact with the terminals, providing a 1000mAh recharging speed to each of the independent bays. Efest SLIM K2 Two Slot Battery Charger Features: Made from Fire Retardant PC Material Dual Slot Charger

The Efest SLIM K2 Two-Slot Battery Charger is a dual-slotted battery charger, designed to charge high-amp battery cells in a quick and rapid fashion. Integrating intelligent battery detection, the SLIM K2 will start charging batteries within seconds of contact with the terminals, providing a 1000mAh recharging speed to each of the independent bays. 

Efest SLIM K2 Two-Slot Battery Charger Features:

  • Made from Fire Retardant PC Material
  • Dual Slot Charger
  • Independently Charging and Monitoring
  • Intelligent Two Bay Battery Charger
  • Piano Wire Spring - Tensile Test
  • Convenient LED Battery Charge Indicator Light
  • Spring-Loaded Sliding Battery Charging Platform
  • Auto-Detect Charging Function
  • Low Voltage Activation Function
  • Input: DC 5V/2A
  • Reverse Polarity Protection
  • Over-Charging Protection
  • Short-Circuit Protection
  • Activation Recovery Function
  • Stops Charging Automatically
  • Quality Certification
  • MicroUSB Port
  • Compatible with 20700, 26650, 18650, 18500, 18350, 17340, 16340, 14500, 10440, 26500
  • Certified by RoHS, CE

Includes:

  • 1 Efest Slim K2 Two-Slot Battery Charger
  • 1 MicroUSB Cable
  • 1 User Manual
*WE CAN NOT GUARANTEE YOUR REQUESTED STYLE WILL BE IN STOCK*
**AVAILABLE STYLES ARE SUBJECT TO CHANGE WITHOUT NOTICE BECAUSE WE MANUALLY CHECK OUR QUANTITIES AND THESE ITEMS ARE AVAILABLE IN AN ASSORTMENT.*
**COLORS MAY DIFFER SLIGHTLY FROM THE PHOTO.*

Note: There is always an inherent risk when using any rechargeable batteries at any time and under any circumstances. MultilineOnline.com and any of MultilineOnline.com’s parent and subsidiary companies are not held responsible for any damage for/or any modification of the batteries, chargers, devices, and other products that we carry in any form or shape, this is including pack making.

MultilineOnline.com and any or all of MultilineOnline.com’s parent and subsidiary companies will not be held responsible or liable for any injury, damage, or defect, permanent or temporary that may be caused by the improper use of a Li-ion (Lithium-ion), LiPo (Lithium-ion Polymer) and any rechargeable battery/batteries as well as chargers. Please have a greater understanding of the batteries/chargers you are using and how to care for them properly.

When working with Li-ion (Lithium-ion), LiPo (Lithium-ion Polymer), and any rechargeable cells, please be cautious and carefully use them as they are very sensitive to charging characteristics and may explode or burn if mishandled. Please make sure that you have great knowledge of all rechargeable batteries before you use them. Always charge batteries on a clean and fire-proof surface. Never leave charging batteries unattended. If you see that there are visible damages on the batteries, please do not use them. Always keep, store, and transport the rechargeable cells in a safe, non-conductive container in a controlled environment.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 60681220933

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4.0 ★★★★★
Based on 19 reviews
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T
Verified Purchase
T-gal
Omaha, US
★★★★★ 5
So far, so good!
Finally! A toy my 55 pound, 18 month old puppy hasn’t destroyed in minutes, and one she actually LOVES playing with. It has a really cool bounce and she loves chasing it and it’s easy for her to grab and run back to me with. So glad it wasn’t another waste of money. My only suggestions are to make this in a fun color other than black, and to make other just as strong toys besides a donut (she already has 2 other donuts from different companies which surprisingly have weathered her jaws) and add a squeaker to one of these ultra strong toys. More than chasing the ball, she loves squeaking!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
M
Verified Purchase
Melissa j
Phoenix, US
★★★★★ 5
10/10 Great game changer for aggressive chewers
After a scary experience where our Doberman ingested part of a toy and needed emergency surgery, we had to get rid of all plush toys and small balls in our house. Replacing everything felt overwhelming. This ball has been fantastic. It’s truly built for aggressive chewers and holds up incredibly well. It’s perfect for fetch, strong enough for tug-of-war, and the bounce is excellent, which keeps our dog fully engaged during self-play when he’s entertaining himself. That unpredictable bounce makes it exciting without being unsafe. Most importantly, it gives us peace of mind. No shredding, no chunks coming off, no felt cover and constant worry about ingestion. Since having to replace all of his previous toys and balls, this one has stood out as the best by far. If you have a large, powerful dog—especially a Doberman—or a dog who destroys toys quickly, this is a must-have. Durable, safe, and genuinely fun. 10/10, highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2026
C
Verified Purchase
Crystal Knapp
Dallas, US
★★★★★ 5
Finally, a sturdy oversized ball my boy can't destroy! And can pick up easily
This is just wonderful! My dog has destroyed all other balls! I think this is finally one he cannot destroy. And I love the holes so he can pick it up and throw it himself. LOL. And it BOUNCES, bringing him endless joy and skill in catching it. Cause you don't know which way it will bounce off the ground. Oversize was just right for him. Glad to have found this great sturdy ball.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
K
Verified Purchase
Kristi V.
San Leandro, US
★★★★★ 4
Almost perfect...upraised logo should be left off
This toy is great for relentless chewers with strong jaws! It would be almost perfect if it didn't have a "K9" logo in raised rubber on it. That is the place that my aggressive chewer shepherd/bulldog mix focuses on and is able to get small chunks off. Without that logo, he would chew the ball more evenly, instead of fixating on that one spot. He loves this ball and has chewed on it for about an hour off & on each of the 11 days he has had it. Although it is very durable so far, the flaw is the upraised logo.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
R
Verified Purchase
Ryan
Louisville, US
★★★★★ 5
Perfect for High-Drive Dogs & Surprisingly Durable (six month review)
I use this ring ball for structured fetch and tug sessions with my high-drive German Shepherd mix (91 lbs. at 10 mon.), and it’s easily the best toy we’ve added to our routine. What makes it truly exceptional is how it allows my dog to engage in the full canine predatory sequence: • Chase: He locks in visually and bolts after the ring when I throw it. • Grab & Hold: He brings it back, pins it against my leg, and bites down firmly (the toy—not the leg!)—his way of acting out the natural catch-and-control behavior. • Unalive & Tug: We finish with a strong tug session, which satisfies his instinct to grip and shake—basically his version of “making the toy unalive.” • Settle & Chew: Afterward, he relaxes with a chew toy or eats—completing the full physical and mental cycle in a healthy, balanced way. Durability is outstanding—this toy stands up to intense tug sessions with no tearing or damage, even with a 91 lb powerhouse. My senior dog also joins in for double tug play, and it holds up beautifully to that too. I don’t leave this toy down for chewing—it’s not a chew toy. I use it specifically for fetch and tug, then put it away when we’re done. This keeps it exciting and extends its lifespan. My dog has other chew toys he can use freely throughout the day. This isn’t just another fetch toy—when thoughtful it provides a structured, instinct-satisfying experience that’s mentally enriching and physically engaging. If you have a high-drive or working breed, or a dog who thrives on interactive play, this ring ball is 100% worth it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2025

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