TOP PICKS
Bestseller No. 1
21750 21700 Battery Charger,LCD Intelligent 18650 Battery Charger 21750 21700 Charger for 20700 22700 26650 26700 16340 (RCR123) 17500 17650 17670 18500 Rechargeable Battery with PCB Protection Board
- Long Slot :This charger has 75 mm slot,it can support Battery less than 75 mm,such as 21750 21700 20700 26700 26650 18650 battery with PCB Protection Board.So you can charge your led torch battery and other home appliance .
- Universal Compatibility :This smart USB battery charger Compatible With 1.2V Ni-MH Ni-CD AA AAA AAAA C SC F6 Li-ion IMR INR ICR 21750 18650 20700 21700 22700 26650 26700 10440 14500 14650 16340 (RCR123) 16650 17500 17650 17670 18350 18490 18500 Rechargeable Batteries.Of course,It can support 3600 mAh or higher capacity battery.
- Intelligent Design :Press C to view C1 and C2, the information displays on the current screen is the charging status information of corresponding channel.For current setting, press A to switch the charging current to 0.5A, 1A and 2A,for Ni-MH Battery:0.5A.So you can control the charge time .
- Safety Assurance :Safety Assurance: Comes with special charge and discharge management circuit. With multiple security protection settings, the charger can effectively prevent reverse, short circuit, overcharge, over discharge, over-current damage to the battery, which makes users using the product without any safety concern.
SaleBestseller No. 2 −10%
IMREN 18650 Battery Charger,21700 battery charger for 3.7V 14500 10400 18500 18350 18650 18700 20700 21700 22650 26650 Lithium Battery,1.2V Ni-MH/Ni-Cd AA AAA C Battery(4 bay)
- 【18650 Battery Charger】-The 18650 Charger for -1.2V Ni-MH Ni-Cd A/AA/AAA/AAAA 10440 14500 14650 16340 17335 17500 18500 18350 18650 18700 20700 21700 22650 25500 Battery
- 【Smart 21700 Battery Charger】-The 18650 battery charger have a Single battery charging capability,You can charge any number of batteries without charging in pairs. This can better extend battery life.Intelligently identify input power and automatically adjust suitable charge current, the battery charger can automatically detect Li-ion and Ni-MH batteries and charge different type of batteries at same time and separately.
- 【2000mA Fast Charger】- The 20700 battery charger there current patterns, and you can freely switch between 0.5 / 1A / 2A with the middle button.The default two slots are 1A current normal charge mode, press the MODE button, automatically switch to 2000mA current fast charge mode.
- 【USB-C Battery Charger】-USB-C Powered Universal Intelligent 18650 Battery Charger, allows for on the go worldwide portability.the USB charging cable can be connected to USB socket, car charger, computer, phone adapter, other USB output equipment to charge.
- 【75MM Long Slot】 -The 21700 battery charger has 75 mm slot, support Battery less than 75 mm, such as 21700 20700 26650 18650 battery with botton top.
Bestseller No. 4
Nitecore UMS4 Intelligent USB Four Slot Quick Battery Charger for Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650 21700 20700 AA AAA and More Batteries, with LumenTac Battery Organizer
- FAST AND EFFICIENT CHARGING- Reach a maximum total of 2000mA when using a 2A output USB power adapter. Connect a quick charge (QC) power adapter for high speed charging and reach a single slot max output of 3000mA.
- LCD DISPLAY- Reports key realtime information such as battery health, charging status and charging mode.
- INTELLIGENT CHARGING- Automatically selects appropriate charging current and voltage.
- BATTERY TYPES & SIZES - Compatible with various battery types (li-ion/imr/lifep04/ni-cd/ni-mh) and common battery sizes including (18650, 21700, 16340,14500 and more).
- PERFECT FOR TRAVEL AND EDC - This bundle includes a LumenTac battery organizer to keep you organized when you are on the go.
SaleBestseller No. 5 −30%
WISSBLUE 18650 Battery Charger, LCD Screen Can Display Capacity, Adjustable 2A Lithium Battery Charger, Suitable for 26650 21700 18350 17500 14500 RCR123A,NiMH NiCd AAA A
- 【WIDE COMPATIBILITY】: The Fast 18650 Charger Is Compatible With All 3.7v Lithium Batteries And 1.2v Nimh/Nicd Aa Aaa Batteries. Smooth And Durable Stainless Steel Rails For Cell Lengths From 34mm To 75mm
- 【SMART LCD DISPLAY】;Lcd4 18650 Charger Monitors Detailed Real Battery Condition, Time Per Charge/Charging Capacity, Battery Voltage, Charging Progress %, Battery Type, Charging Speed To Identify The Real Capacity Of The Battery
- 【SAFELY ADJUST CHARGING SPEED】: Switch Between Slow/Medium/Fast Charging As Needed, Shorten Charging Time By Up To 35%, Intelligent Circuit To Prevent Short Circuit, Overheating, And Overvoltage，Automatic Stop When Full
- 【18650 BATTERY CHARGING TIME】: 2.3 Hours Full Lithium Ion Panasonic Ncr18650b 3400mah, 3.5 Hours Full 21700 Battery 5000mah, 0.5 Hours Full Amazonbasics 800mah AAA Battery,1.5 Hours Full Eneloop 2500mah AA, 1.5 Hours Full 3.6v 2500mah Lithium Ion High Power Consumption Lg He2
- 【UNIVERSAL CHARGER】: Universal Usb Interface, You Can Use Solar Charger, Mobile Power, Computer, Car Charger, Usb Wall Charger, Etc. To Charge 18650 Batteries Anytime And Anywhere. Best 18650 Battery Charger 4 Slots, Suitable For Home Or Outdoor
SaleBestseller No. 6 −17%
18650 Battery Charger,Smart Lithium Battery Charger AA Battery Charger with LCD Display for 3.7v Lithium ion Battery 18650 26650 21700 17500 14500 RC123A,1.2v NiMH AA AAA Battery(Charger Only)
- 🔋【4 bay 18650 battery charger】：Compatible with 3.7v Lithium li-ion rechargeable batteries 18650 26650 21700 18350 16340(RCR123) 10440 17670 18490 17500.And 1.2V/Ni-mh/Ni-cd batteries AAAA AAA AA A.The charger will automatically recognize the battery type.
- 🔋【Lithium Battery Charger】: The 18650 battery charger has an LCD display, The button C switches the monitoring status, which can display the charging voltage, charging time, charging capacity, and charging progress% of each charging slot. Button A switches the charging current 0.5A/1A/2A, the 2500mAh battery can be fully charged in 1.5 hours
- 🔋【Safety Protection】: Safe and fire prevention PC+ABS material Battery Charger, Built-in intelligent circuits protection to protect the battery safety charged. A protection against short circuit, overheat, over-voltage and over-discharge. Distinctively, the discharging function can decrease the hurt of battery, making it more efficient and environmentally friendly.
- 🔋【Portable And Compact】: 4 Slot Battery Charger Design Can Charge 4 Different Batteries At The Same Time, Equipped With 3 Input Ports: USB-C / Lightning / Micro, It Becomes Your Best Travel 18650 Universal Charger. Note: Only Charger,No Battery.
- 🔋【PREMIUM SERVICE】: If you have any questions, please tell us at first time. We will provide professional service to solve your problems. There is a totally risk-free purchase.
Bestseller No. 7
MiBOXER 18650 Battery Charger, 8-Bay Smart Charger with Automatic LCD Display, Fast Charge Rechargeable Li-ion LiFePO4 Ni-MH Ni-Cd AA AAA C 21700 26650 13650 16340 18350 18700 RCR123
- ⚡【Birthday Gift, 8-Bay Battery Charger】Our chargeable battery charger is made of PC Fire retardant material with excellent heat dissipation and electronic circuit design. When battery is reversed or short-circuited, it will show error symbol. After battery fully charged, it just sopped charging automatically. If the battery is over discharged, our smart charger can even activate this battery. If it is damaged, LCD display will show error and stop charging.
- ⚡【Universal Battery Charger】Multi-bay battery charger is fully compatible with Li-ion /IMR /INR /ICR /LiFePO4(3.6V): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430,14500, 14650, 16500,16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490,18500,18650,18700, 20700, 21700,(Support battery up to 73mm long) 22500, 22650,25500, 26500, 26650; Ni-MH / Ni-Cd(1.48V): AA, AAA, AAAA, C,SC. Dual power input with DC 12V/3A (support car charge, but not included)
- ⚡【Fast Charging, Easy to Use】This Intelligent battery charger charges 8 rechargeable different type of cylindrical batteries simultaneously. You can set the single-channel charging current up to 1.5A max. Automatically/manually select the optimum charge current. Supports 8-bay simultaneous independent charging without affecting. ⚠️ Please noticed that it can auto detect Li-ion(4.2v) and Ni-MH/Ni-Cd(1.48v), but you need to select set battery type when charging Li-ion(4.35v) and LiFePO4.
- ⚡【Multi-Functional LCD Display】This 18650 and AAA/AA battery charger with large screen display can show voltage,current,charging time,mode,battery type,internal resistance and battery capacity that charged, easily to understand the charging datum. The LCD back-light will become dark after 1 minutes without any operation.
- ⚡【Birthday Gift Choice】Package includes 1* Battery fast charger(without battery), 1* power adapter, 1* user manual. One of memorable presents that you can give.
Bestseller No. 8
3.7 Volt 21700 Rechargeable Battery with Charger 5000mAh Battery 2Pcs Large Capacity Batteries for LED Flashlight, Headlamps, Doorbells, Toys, Cameras etc
- 【Wide Application】5000mAh rechargeable battery, compatible with Flashlight, Headlamps, Doorbells, Toys, Cameras, etc.
- 【Product Advantage】No memory effect, they can be charged many times when fully or partially drained.
- 【Content】You will get 2 pieces of 21700 batteries and 1 charger.
- 【Note】These are 21700 battery, this kind of battery is bigger than most of batteries, such as AA, AAA batteries, please make sure you are buying the right ones.
Bestseller No. 9
Dlyfull 18650 Battery Charger, Fast Universal Charger for 3.7V Li-ion IMR INR ICR 21700 10340 17335 17670 18500 18700 20700 26650 and 1.2V Ni-MH/CD AAAA AAA AA A C SC Rechargeable Batteries (4 Bay)
- Wide Compatibility: The universal battery charger has 4 independent charging slots suitable for 3.6V/3.7V Li-ion/IMR/INR/ICR 26650, 26500, 25500, 22650, 22500, 21700, 20700, 18700, 18650, 18500, 18490, 18350, 17670, 17650, 17500, 17350, 16650, 16340 (RCR123), 16500, 14650, 14500, 14430, 14350, 13650, 13500, 13450, 12650, 12500, 12340, 10500, 10440, 10350, 10340, and 1.2V Ni-MH/Ni-CD AAAA/AAA/AA/A/C/SC rechargeable batteries.
- High-Speed USB-C Battery Charger: The highest charging current for a 3.7V lithium battery charger can reach 2000mA (limited to slot 4 only), 1000mA for two batteries, and 500mA for four batteries. The charging current for 1.2V Ni-MH/Ni-CD rechargeable batteries is 500mA.
- Charge Anytime & Anywhere: The 18650 battery charger is powered through a USB port, allowing you to supply power to it via a PC, adapter, portable power bank, or car charger, making it incredibly convenient.
- Multiple Protection System: The smart aa battery charger features a 0V/low-voltage activation function, as well as functions for thermal and overcurrent protection, overvoltage protection, short-circuit protection, overcharge protection, and the detection of non-rechargeable and defective batteries.
- What You'll Receive: 1 Dlyfull M4S 4 bay battery charger, 1 Type-C cable, user manual, 24-hour customer service, and a 1-year warranty. (Note: Do not charge non-rechargeable batteries.)
Bestseller No. 10
Intelligent 21700 18650 Battery Charger,LCD 21700 Battery Charger 21750 21700 18650 Charger for 20700 22700 26650 26700 16340 (RCR123) 17650 17670 Ni-MH/Ni-Cd AA AAA Rechargeable(Battery Excluded)
- Great Compatibility Advantage:With 75 mm slots,this charger can support 26700 21700 22700 20700 17670 battery,even these battery has PCB protection board.Of course,this charger can also support 22750 21750 18650 22650 26650 14500 14650 16340 (RCR123) 16650 17500 17650 18490 18500 1.2V Ni-MH Ni-CD AA AAA AAAA C SC F6 Li-ion IMR INR ICR Rechargeable Batteries(Battery Excluded)
- Smart Charger Design:Press Button A,you can switch the charge current to0.5A, 1A and 2A.Note:Ni-MH Battery,only 0.5A.Press C to view C1 and C2,LCD will show the status of the charging battery.
- Intelligent Charge Technology:This charger has micro computer system,with two independent channels.So it can charge the battery effectively,in the meantime,prevent the damage of reverse connection,prevent short circuit,prevent over charge and over current to the battery.
- Important Warm Tips:CR123A is Non-rechargeable,please don’t charge it.Before charge,please check your battery.If broken,please don’t try to charge it.
BUYING GUIDE
Selecting the best 21700 battery charger involves understanding your specific needs and considering several key features. Here’s a comprehensive guide to help you make an informed decision:
1. Compatibility and Versatility:
Ensure the charger you choose is designed to accommodate 21700 batteries. Some chargers can handle various battery sizes and types, so if you use multiple kinds, a versatile charger might be most beneficial. Also, confirm if the charger supports both Li-ion and Ni-MH chemistries, especially if your devices require different battery types.
2. Charging Speed and Control:
Chargers offer different charging speeds. If you need your batteries ready quickly, a fast charger is convenient. However, be aware that frequent fast charging can potentially shorten battery life. Some advanced chargers allow you to control the charging speed (slow, medium, fast) to suit your urgency and prolong battery health.
3. Intelligent Charging:
Many modern chargers feature smart technology, using microprocessors to regulate the charging process. They can adapt the charging current, identify when the battery reaches full capacity, and shift to trickle charging to maintain the charge without overdoing it. This intelligence prolongs battery life and conserves energy.
4. Safety Mechanisms:
Safety is crucial with battery chargers. Overcharging a battery can lead to overheating and, in extreme cases, fire or explosion. Quality chargers incorporate safety features such as overcharge protection, overheat protection, short-circuit protection, and reverse polarity detection. These features ensure safe charging practices and protect your investment.
5. Display and Indicators:
Choose a charger with a clear indicator system so you can easily monitor the charging process. Basic models might have simple LED lights, while more sophisticated ones feature digital screens showing detailed information about the charging status, current, voltage, and even battery health diagnostics.
6. Portability:
If you need a charger for travel, consider its size and weight. Some chargers are designed for portability, with features like foldable plugs or USB connections for convenient charging anywhere you can connect to a power source.
7. Build Quality:
The durability of your charger is significant, particularly if you’ll be using it frequently or in varying environments. A well-constructed, robust charger will resist wear and tear, providing reliable performance over time.
8. Brand Reputation and Price:
Opt for a charger from a reputable brand known for quality and safety, even if it costs a bit more. Compare prices among reputable options and consider the warranty and customer support offered. Remember, a reliable charger is an investment in safety and longevity.
9. Customer Reviews:
Check recent customer reviews and ratings to understand the charger’s performance from a user perspective. Reviews can reveal real-world pros and cons not mentioned in the product’s official description.
10. Eco-friendliness:
Some chargers have energy-saving features, such as automatic shutdown or standby modes that conserve electricity when the charger is not actively charging.
11. Extra Features:
Look for any additional conveniences like the ability to charge multiple batteries simultaneously, compatibility with international voltage standards, or included car adapters for charging on the go.
Remember, the best 21700 battery charger will meet your specific needs in terms of performance, convenience, safety, and reliability. Always follow the manufacturer’s instructions for charging and handling to ensure safety and maximize battery life.
