SKU: 71091981002

Koolux BK6S & Koolux BK6S PRO eBike Battery - 48V

Sale price$94.50 Regular price$105.00
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Description

Koolux BK6S & Koolux BK6S PRO eBike Battery - 48V48V 13Ah Silverfish Lithium Battery Pack for Koolux BK6S 4. 0 & Koolux BK6S PRO Upgrade your Koolux BK6S 4. 0 Folding E Bike or BK6S PRO with this high performance 48V 13Ah Silverfish lithium battery designed to deliver stronger torque, smoother acceleration, and excellent long distance capability. Built with 2600mAh A+ Grade cells and an intelligent 30A BMS, this battery ensures stable voltage output, reliable power delivery, and long term durability

48V 13Ah Silverfish Lithium Battery Pack for Koolux BK6S 4.0 & Koolux BK6S PRO

Upgrade your Koolux BK6S 4.0 Folding E-Bike or BK6S PRO with this high-performance 48V 13Ah Silverfish lithium battery designed to deliver stronger torque, smoother acceleration, and excellent long-distance capability. Built with 2600mAh A+ Grade cells and an intelligent 30A BMS, this battery ensures stable voltage output, reliable power delivery, and long-term durability for both commuting and extended riding.


Key Features
  • Optimised for Koolux BK6S Models: Fully compatible with BK6S 4.0 and BK6S PRO, ensuring improved torque and stable output.
  • High-Power Performance (48V 13Ah): Delivers smooth acceleration, reliable torque, and steady voltage.
  • A+ Grade 2600mAh Cells: Provides long lifespan, stable performance, and high efficiency.
  • 30A Intelligent BMS: Protects against overcharge, discharge, overcurrent, overheating, and short-circuit faults.
  • 4-Pin Charging Port: Safe and stable charging interface for Koolux Silverfish systems.
  • Durable Aluminium Silverfish Case: Offers excellent heat dissipation, strength, and long-term durability.
  • Secure Locking System: Comes with 2 keys to lock the battery to the mounting rail to prevent theft.
  • On/Off Switch: Allows safe shutdown when not in use to preserve battery life.

Technical Specifications
  • Voltage: 48V
  • Capacity: 13Ah
  • Battery Type: Lithium-Ion (Li-Ion)
  • Cell Specification: 2600mAh A+ Grade
  • Configuration: 13S5P
  • BMS Rating: 30A Intelligent Protection
  • Suitable Motor Power: 200W – 1000W
  • Charging Pins: 4-Pin Interface
  • Charger: 54.6V 3A Fast Charger Included
  • Default Connector: XT60 Female
  • Dimensions: 390mm × 110mm × 75mm
  • Weight: 4.8 kg
  • Colour: Silver
  • Material: Aluminium Housing
  • Certifications: UKCA, CE, UN38.3, MSDS

What's Included
  • 1 × 48V 13Ah Silverfish Battery
  • 1 × 54.6V 3A Charger
  • 2 × Keys
  • 1 × 4-Pin Discharge Cable (XT60 Female)
  • 1 × Mounting Rail
  • 1 × Instruction Manual

Compatible With

This battery is fully compatible with:

  • Koolux BK6S 4.0 Folding E-Bike
  • Koolux BK6S PRO

It also works with various 48V Silverfish-style e-bikes including folding bikes, city bikes, trekking bikes, e-MTBs, and 48V electric bike conversion kits.


Quality & Reliability

Each battery undergoes strict testing to ensure capacity accuracy, voltage stability, and long-term durability. Designed for hundreds of charge cycles, this replacement battery restores your Koolux e-bike to peak performance with dependable power for daily commuting or long-distance riding.


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: 71091981002

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Kimberly
Alexandria, US
★★★★★ 5
Snagged a deal
Size: 7, Color: Redwood/Gum 10
I waited and waited to get these boots! I knew I was chancing it, but they went on sale, and I snagged them! I am a size 7, and they fit nicely with socks. a little loose, barefooted, but what psycho wears boots without socks? They are comfortable and really well-made.
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Reviewed in the United States on April 8, 2026
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ashlynnk
Carnegie, US
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days. The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
A
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Abby B
Port Orchard, US
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
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EE
Alexandria, US
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026
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Kate
Port Orchard, US
★★★★★ 5
Super cute, comfortable, practical, love that they are slip on
Size: 10.5, Color: Tobacco/Black
I have worn these 2-3 times already. The first day was a school/work day so I was on my feet 9 hours and the only issue I had was with the side of the boot rubbing against my ankle. I just make sure I wear socks high enough to cover my ankles or jeans that go into the boots now for long wear days. Absolutely love them! They keep my feet dry in this snow( we live in Michigan). I had been looking for a pair like this for awhile now and was getting super frustrated that I couldn't find my size in any that I liked. I saw that they had these available in a 10.5 and I wear 11. I looked at the Sorel website reviews (since the amazon ones weren't super helpful on sizing) and they said that the boots ran big so I took a chance on the 10.5 fitting me. They fit perfect. I have long narrow feet but I could see where they would be tight or uncomfortable on someone with wider feet. I've been trying to find a pair for my mom now since she has boot envy.
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Reviewed in the United States on January 27, 2026

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