10 Best Battery Charger 21700 in the UK 2025
Updated on 02/08/2025
#1
Recommended
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- Charges two 18650 2500mAh batteries in 1.5 hours with adjustable current settings (0.5A, 1A, 2A). Compatible with multiple Li-ion and Ni-MH/Ni-CD batteries including sizes AAA, AA, C, 18650, and more.
- Features an LCD screen displaying battery charge percentage, voltage, current, and capacity. Offers dual charging options via AC input or Micro USB for convenience.
- Provides a 5V USB output to power devices like mobile phones and flashlights while on the go.
- Equipped with safety features including CE, FCC, and RoHS certifications, fire retardant materials, and protections against reverse polarity, short circuits, and overheating.
- Includes X4 Charger, UK Power Cord, and User Manual in the package.
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- Charges two 18650 2500mAh batteries in 1.5 hours with adjustable current settings (0.5A, 1A, 2A). Compatible with multiple Li-ion and Ni-MH/Ni-CD batteries including sizes AAA, AA, C, 18650, and more.
- Features an LCD screen displaying battery charge percentage, voltage, current, and capacity. Offers dual charging options via AC input or Micro USB for convenience.
- Provides a 5V USB output to power devices like mobile phones and flashlights while on the go.
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#2
Value for Money
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- Charges a wide range of batteries including 3.6V/3.7V Li-ion (14500-26650) and 1.2V Ni-MH/Ni-CD, along with protected 20700 and 21700 models.
- Features auto-selected charging current of 0.5A, 1A, or 2A for efficient charging, fully charging a 18650 2500mAh battery in 1.5 hours using 2A.
- Dial-LCD screen shows real-time information such as charging current, battery voltage, and charging capacity; supports both AC input and Micro USB for versatility.
- Includes a 0V activation function for reviving over-discharged batteries, allowing reuse instead of disposal.
- Package includes XTAR X2 Charger and UK Power cord; replacement available if incorrect cord is received.
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- Charges a wide range of batteries including 3.6V/3.7V Li-ion (14500-26650) and 1.2V Ni-MH/Ni-CD, along with protected 20700 and 21700 models.
- Features auto-selected charging current of 0.5A, 1A, or 2A for efficient charging, fully charging a 18650 2500mAh battery in 1.5 hours using 2A.
- Dial-LCD screen shows real-time information such as charging current, battery voltage, and charging capacity; supports both AC input and Micro USB for versatility.
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#3
5% Off
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- Designed for batteries with a slot length of 75 mm, compatible with 21750, 21700, 20700, 26650, 18650, and more with PCB protection.
- Compatible with a wide range of rechargeable batteries, including Ni-MH, Ni-CD, and various Li-ion formats up to 3600 mAh, but not CR123A.
- Features an intelligent interface for monitoring charging status and adjusting current settings between 0.5A, 1A, and 2A for optimized charging times.
- Equipped with multiple safety features to prevent issues like overcharging, short circuits, and reverse charge, ensuring user safety during operation.
- Avoid using with CR123, CR123A, or 1.5V Lithium Ion batteries; it's recommended to unplug after charging Ni-MH batteries to prevent overcharge.
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- Designed for batteries with a slot length of 75 mm, compatible with 21750, 21700, 20700, 26650, 18650, and more with PCB protection.
- Compatible with a wide range of rechargeable batteries, including Ni-MH, Ni-CD, and various Li-ion formats up to 3600 mAh, but not CR123A.
- Features an intelligent interface for monitoring charging status and adjusting current settings between 0.5A, 1A, and 2A for optimized charging times.
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#4
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- Compatible with a wide range of Li-ion (3.6V/3.7V) and Ni-MH/Ni-CD (1.2V) rechargeable batteries, including various sizes from 10440 to 26650.
- Automatically detects battery types, ensuring safe charging for both rechargeable and non-rechargeable batteries.
- Allows users to select charging current (0.5A, 1A, 2A) for optimized charging speed based on needs.
- Features individual LED indicators for each slot to display real-time charging status of each battery.
- Equipped with multiple safety features including reverse charging, overcharge, and overheat protections to ensure safe operation.
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- Compatible with a wide range of Li-ion (3.6V/3.7V) and Ni-MH/Ni-CD (1.2V) rechargeable batteries, including various sizes from 10440 to 26650.
- Automatically detects battery types, ensuring safe charging for both rechargeable and non-rechargeable batteries.
- Allows users to select charging current (0.5A, 1A, 2A) for optimized charging speed based on needs.
- Features individual LED indicators for each slot to display real-time charging status of each battery.
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#5
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- LCD display shows charge status, voltage, current, internal resistance, and errors.
- Charges 1-8 Li-Ion and Ni-MH cells, compatible with sizes like AAA, AA, and 18650.
- Employs a three-stage TC / CC / CV charging method with 8 independent channels.
- Tests battery capacity through charging cycles to identify true performance.
- Built-in safety features protect against incorrect insertion, over-current, and short circuits.
- Manufactured from flame-retardant materials with a temperature control system for user safety.
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- LCD display shows charge status, voltage, current, internal resistance, and errors.
- Charges 1-8 Li-Ion and Ni-MH cells, compatible with sizes like AAA, AA, and 18650.
- Employs a three-stage TC / CC / CV charging method with 8 independent channels.
- Tests battery capacity through charging cycles to identify true performance.
- Built-in safety features protect against incorrect insertion, over-current, and short circuits.
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#6
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- LCD display provides battery capacity information
- Micro-USB powered for convenient charging
- Efficient charging method (TC-CC-CV) using 0.5Ax2
- 0V activation function reconditions old or over-discharged batteries
- CE RoHS FCC certified for safety and durability with 12-month free repair
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- LCD display provides battery capacity information
- Micro-USB powered for convenient charging
- Efficient charging method (TC-CC-CV) using 0.5Ax2
- 0V activation function reconditions old or over-discharged batteries
- CE RoHS FCC certified for safety and durability with 12-month free repair
#7
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- Universal compatibility for charging a variety of Lithium-ion and Ni-MH batteries, including 3.6V/3.7V Li-ion and 1.2V Ni-MH/Ni-CD types.
- Smart charging technology optimizes the current up to 3A based on internal resistance, with manual settings available for fine-tuning charging speeds.
- Features multiple modes, including Grad mode to display real battery capacity after charge cycles and Store mode to extend battery lifespan.
- Constructed with fire-retardant materials and equipped with a real-time temperature control system for enhanced safety, including error alerts for reversed or short-circuited batteries.
- Includes the VC4SL charger, a UK 18W adapter, Type C cable, manual, and a waterproof storage bag, with advice on proper charging practices to prolong battery life.
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- Universal compatibility for charging a variety of Lithium-ion and Ni-MH batteries, including 3.6V/3.7V Li-ion and 1.2V Ni-MH/Ni-CD types.
- Smart charging technology optimizes the current up to 3A based on internal resistance, with manual settings available for fine-tuning charging speeds.
- Features multiple modes, including Grad mode to display real battery capacity after charge cycles and Store mode to extend battery lifespan.
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#8
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- Charges multiple battery types including AA, AAA, 18650, and 21700.
- Features dual slots for simultaneous charging of two batteries.
- Supports fast charging at a rate of 1A.
- Compatible with NiMH and Li-ion battery types.
- Compact design for easy portability.
- User-friendly interface for convenient operation.
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- Charges multiple battery types including AA, AAA, 18650, and 21700.
- Features dual slots for simultaneous charging of two batteries.
- Supports fast charging at a rate of 1A.
- Compatible with NiMH and Li-ion battery types.
- Compact design for easy portability.
- User-friendly interface for convenient operation.
#9
5% Off
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- Compatible with a wide range of batteries including 26700, 21700, 18650, and more, even with PCB protection.
- Adjustable charge current settings at 0.5A, 1A, and 2A, with a specific note for Ni-MH batteries at 0.5A.
- Microcomputer system enables efficient charging and protection features against reverse connection, short circuits, overcharging, and overcurrent.
- Certifications include CE, UKCA, PSE, and FCC, with ROHS compliance for environmental safety.
- CR123A batteries are non-rechargeable; check battery condition before charging to avoid damage.
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- Compatible with a wide range of batteries including 26700, 21700, 18650, and more, even with PCB protection.
- Adjustable charge current settings at 0.5A, 1A, and 2A, with a specific note for Ni-MH batteries at 0.5A.
- Microcomputer system enables efficient charging and protection features against reverse connection, short circuits, overcharging, and overcurrent.
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#10
19% Off
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- Compatible with various battery types including 3.6V/3.7V Li-ion, Ni-MH, and Ni-Cd batteries.
- LCD display provides real-time charging information including current, voltage, and battery capacity.
- Type-C powered with multiple charging current options (2A, 1A, 0.5A) for versatility.
- Displays actual charging capacity and status to optimize battery life.
- Includes a battery charger, user manual, and USB-C cable, with customer support and lifetime maintenance offered.
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- Compatible with various battery types including 3.6V/3.7V Li-ion, Ni-MH, and Ni-Cd batteries.
- LCD display provides real-time charging information including current, voltage, and battery capacity.
- Type-C powered with multiple charging current options (2A, 1A, 0.5A) for versatility.
- Displays actual charging capacity and status to optimize battery life.
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