10 Best 12v Battery Box 18650 in The UK

Last updated on 16/08/2025

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hero-s 12V Waterproof Battery for Box with USB Interface Support 6x 18650 Battery DIY for Bike LED Light Lamp Smartphone Battery Holder Socket Adapter Organizer Plug connector Splitter cover Data

Why We Love It

Versatile charging for multiple devices.
Improves battery performance significantly.
Easy to use and safe.

Main Highlights

Suitable for bike USB 5V LED light or 12V LED light Router,and charge phone tablet PC and more. Improve replacement battery pack inconvenient shortcomings,greatly facilitate the users of the battery pack DIY requirements,without spot welding battery,thereby greatly reducing the battery internal resistance,improve the battery discharge performance,so as to effectively improve battery life
Without 18650 battery,You need to prepare 6x 18650 batteries yourself to use. 5.5x2.1mm interface has input and output functions,with adapter,easy to use.
5.5x2.1mm port for 12V LED Light Router or other devices USB 5V Port for Charging phone GPS Tablet PC or 5V LED Light and more.
Power supply:you can use 18650 rechargeable lithium battery as a power source
The output side:USB and dual output power supply function, output voltage is 12V(can power the 12V device,such as the bike light),USB output voltage is 5V(can power the cellphone and other 5V device),to meet a wider usage scenarios,the product comes with overcharge and over discharge protection,protection of the battery is more safe and sustainable

Li-Ion Battery Storage Box 3x7 18650 Holder for Uninterrupted Power Supply UPS diy battery special plastic diy kit, Black, Small

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Why We Love It

Compact and portable size.
Generous internal capacity.
Perfect for 18650 batteries.

Main Highlights

Appearance size: 65*94*150mm
Internal dimensions: 60*80*146mm .can hold 21 pcs 18650
This kit does not include batteries

Tiardey 12V Bicycle Mobile Power Box Batteries Holder 18650 Waterproof Battery Pack USB/DC Double Interface For Bicycle Bike Lamp

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Why We Love It

Versatile port options available.
Offers mobile charging function.
IP67 rated for safety.

Main Highlights

Battery box's round port is connected to 12V bike light. It can be used as output or input. 5V USB port is only for output. Mobile phones and other digital products can be connected. Magic strap to make
The battery holder has a mobile phone charging function. With power display function. You can use two or four 18650 lithium batteries.Can be used for bike light to keep your light on.installation more convenient and faster. Can run mobile devices as emergency backup
IP67. Guarantee safety: overcharge / over-discharge / over-current protection functions USB power supply max up to 2100mA, greatly shorten charging time
USB interface is suitable for connecting bike light, head lamp or charging cell phone in emergency as power bank.When installing batteries, please strictly follow negative and positive direction to avoid any damage of this storage box.
Package Include: 1 x EB03 battery power pack case (batteries NOT included); 1x strap

XBERSTAR 12V 12Ah Battery Case 18650 DIY Box Parts for Energy Storage-DIY Battery Special Plastic DIY kit (Black case)

Why We Love It

Durable non-conductive ABS construction.
Stable performance without heavy metals.
Versatile installation in any position.

Main Highlights

ONLY CASE:12V 12Ah Battery Case,can hold 32PCS 18650 Cells.
RUGGED CONSTRUCTION - The High Impact Resistant Battery Case Is Made Up Of A Non-Conductive ABS Plastic. This Material Has a Strong Resistance To Shock, Vibration, Chemicals and Heat.
【Value for money】: our batteries case have more stable performance and higher power, It doesn't contain any heavy metals and rare metals, no pollution.
【Wide Applications】: As such an excellent lithium battery, you can safely install it in any position.
What You Get: 12V 12Ah Battery Case.

Battery Case Box ABS Waterproof 12V for 6pcs 18650 Lithium Batteries USB DC Two Ports with Cable Portable for Outdoor Traveling Camping Outdoor

Why We Love It

High efficiency for mobile charging.
Clear power display for convenience.
Durable and reliable premium material.

Main Highlights

Input Voltage: The input voltage of 18650 waterproof battery box is 12V, USB output voltage is 5V, current is 2A, can the mobile phone.
Convenient: The waterproof battery case box cover is convenient to use, you can put 6 18650 lithium batteries at the same time.
Power Display: The 18650 battery case box cover is equipped with power display function, convenient for you to read the remaining battery.
XP67 Waterproof: The ABS battery case box cover is XP65 waterproof, no welding, reduces the internal resistance of batteries, improves the discharge performance of the battery and its life.
Premium Material: Made of premium ABS, the battery case box is sturdy, durable, reliable, practical and has a long service life.

Okeeyseda 12V 6X18650 Battery Box LED Light Battery Holder with Cable USB/DC Dual Interface Waterproof Battery Box Easy to Use

Why We Love It

Reliable over-discharge protection included.
Safe overcharge voltage management.
Consistent output for various devices.

Main Highlights

Input voltage:DC 12V
Over-discharge protection voltage 5V
Output voltage:DC port 12V
Overcharge protection voltage 12V
Discharge protection current 9A

DIY 12v no Welding 4 String 18650 Lithium Battery Management System BMS Protection Board Battery Box (4s2p Long)

Why We Love It

Easy and fast assembly.
Compact and cost-effective design.
Comprehensive protection features included.

Main Highlights

Easy and fast assembly: no welding, no need to use solder after assembly, can directly output and use the battery.The product can be composed of 4, 8 or 16 batteries in series
In the 4s4p model, there are 16 batteries on both sides of the board, which can reduce the size, effectively use the area of the board, improve the cost performance and reduce the cost
Taking 3000mAh per battery as an example, a 4s1p board has a complete battery of 15V 3Ah, 4s2p 15V 6Ah and 4s4p 15V 12Ah, you can stack the number of battery packs according to your actual needs. The circuit boards have charge/discharge protection, discharge current protection, temperature protection, voltage equalization and balance charging
Each board has a 15A fuse, so if there is a problem with the battery, it will not affect other batteries
If you choose the charger, you need to choose the DC connector, 16.8V charger, it is recommended that each layer of charging current should not exceed 1a

Xiatiaosann 18650 Li-Ion Battery Storage Box 12V 7A 18650 Holder DIY Battery Case for Power Supply with 3S 40A Battery Protection Board, Nickel Strip, 18650 Bracket, Charger Cable

7% OffFree Shipping

Why We Love It

High-quality, flame-retardant materials.
Safe and reliable use.
Compact and easy to carry.

Main Highlights

✅【Material】Made of high-quality ABS materials, high temperature resistance, and flame retardant, to ensure safety.
✅【Safe and Reliable】Come with 3S 40A battery protection board to prevent overcharge, over discharge, short circuit, and overcurrent, ensuring safe use.
✅【Easy to Use】Comes with a bracket and nickel strip inside the box for easy installation and fixing of 18650 batteries.
✅【Compact Design】The box makes it easy to carry and store, DIY assembly is possible to meet personalized needs.
✅【Good Performance】Supports 12V 7A output, which can power various devices, Reusable, reducing battery waste.
✅【Application】Suitable for various application scenarios such as power banks, power tools and etc
✅【Package Content】1 x 18650 Li-Ion Battery Storage Box DIY Kit, 1 x Mini Digital Voltmeter

MEAKTSMI Universally 3Pcs 18650 Battery Case Box 5V 9V 12V Power Supply Box For LED Light WiFi Router

Why We Love It

Compact design for easy use.
Reliable power during outages.
Versatile for various electronics.

Main Highlights

The small size designs, coupled with a 40cm 5.5x2.1mm splitter cable, makes this Uninterrupted Power Boxes a convenient power backup solution, safeguarding your electronic against unexpected power interruptions.
Perfectly for use home offices, security setups, or any location where consistent power isimportant, keepings your LED lights,and speakers running smoothly during outages.
Ensures uninterrupted power to your devices with this Uninterrupted Power Boxes, suitable for 5V, 9V, and 12V electronics, perfectly for maintaining connection and security.
Suitable for enthusiasts and professional who rely on stable power for routers, surveillances cameras, smartphones, and tablets, ensuring their gadgets remain running well.
This battery case features easy to use switches and requires three new 18650 batteries (not included), providing a stable power supply with multiple output option including a USB port.

Hailege 5pcs 18650 Battery Case Portable Black USB Power Bank Power Charger Pack Box for 1x18650 Battery

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Why We Love It

Customizable battery capacity option.
Standard USB and micro USB.
Compact and portable design.

Main Highlights

1.This is a DIY box, not a power bank (18650 battery is not included).
2.This Power bank box/case needs 1PCS 18650 rechargeable battery. If you install a 2600mAh/3100mAh 18650 rechargeable battery, the capacity of power bank will be 2600mAh/3100mAh.
3.Power bank has a standard USB output and a micro USB input.
4.Size:96*24*23mm.
5.You can use 1800mAh 2200mAh 2600mAh 2800mAh 3400mAh 18650 batteries.

8.7

Excellent

We scanned 236 products

We reviewed these offers relevant to the 12v Battery Box 18650 within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like hero-s, XBERSTAR, Tiardey, Garosa, Okeeyseda, Xiatiaosann, MEAKTSMI, Hailege, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best 12v Battery Box 18650 in the market, we considered we took a deep dive into 1181 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is hero-s 12V Waterproof Battery for Box with USB Interface Support 6x 18650 Battery DIY for Bike LED Light Lamp Smartphone Battery Holder Socket Adapter Organizer Plug connector Splitter cover Data. We love many things about this product by hero-s. What sets it apart from the competition is Versatile charging for multiple devices. , Improves battery performance significantly. , Easy to use and safe. .
The best value product for most shoppers and where user satisfaction is continuously the highest is Li-Ion Battery Storage Box 3x7 18650 Holder for Uninterrupted Power Supply UPS diy battery special plastic diy kit, Black, Small by XBERSTAR based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for 12v Battery Box 18650 and the best cost-to-value ratio is Xiatiaosann 18650 Li-Ion Battery Storage Box 12V 7A 18650 Holder DIY Battery Case for Power Supply with 3S 40A Battery Protection Board, Nickel Strip, 18650 Bracket, Charger Cableat Xiatiaosann with a 7% discount.
Our list of the best 12v Battery Box 18650 is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best 12v Battery Box 18650 in The UK

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We scanned 236 products

We concluded that: