10 Best 18650 Convert 21700 In The Us - Black Friday 2024
Best Choice1
DIVTEK18650 to 21700 Battery Adapter, Converter Adapter for 21700 Flashlight Cases with Metal Contacts 18650 Sleeve Batteries Protective 21700 Battery Adaptor Holder Accessories (10 Battery Converters)
Main highlights- This 18650 to 21700 battery accessories comes with a 5-year warranty and replacement guarantee for any defects or issues. We stand behind the quality of our products and are committed to providing excellent after-sales service.
- ️ This adapter is designed to provide greater flexibility and convenience for flashlight users ect, allowing them to utilize their existing supply of 18650 batteries without having to purchase a new 21700 battery. By simply inserting the 18650 battery into the adapter, users can enjoy the same level of performance and reliability as they would with a specialized battery.
- ️ Divtek 18650 to 21700 battery sleeve is made of ABS material with fire retardant properties, and features highly conductive copper-plated gold battery contacts.
- ️ Divtek 18650 battery tubes are professional battery adapters.Our battery sleeve is designed to provide reliable and safe performance, with high-quality materials and construction that meet industry standards for fire resistance and conductivity. Please note that the weight of this is battery adapter is about 0.25 ounces
- ️ By choosing to use 18650 adapter, users can save both time and money by avoiding the need to purchase new 21700 batteries or dispose of their existing supply of 18650 batteries. This not only reduces waste and environmental impact but also provides a more cost-effective solution for those who already have a large collection of 18650 batteries.
9.8Exceptional
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Value for Money2
LBFButton Top 3.7V 5000mAh Lithium-ion Rechargeable Battery Type-C Input/Output Protection Circuit Built-in Large Capacity 3.6V Replacement Battery for LED Flashlight, Headlamps etc(2 Pack)
Main highlights- 【Secure and Reliable】The highest quality, the happiest customer. LBF Protection Circuit Built-In Battery features six types of protection, including temperature, short circuit, overcharge, and overcurrent protection.
- 【Rechargeable 1000+ Times】 A single 3.6 Volt rechargeable battery can recharge up to 1000 charging and discharging cycles and no memory effect. Replace 1000+ disposable alkaline batteries, reduce the waste of resources and good value for the money.
- 【Large Capacity】 LBF 3.7V battery with a capacity of 5000mAh and voltage of 3.7V, high capacity battery with low self discharge rate, high power consumption, high energy density and pollution-free design, No need to charge batteries frequently.
- 【Battery Specification】Battery type: Button Top PCB Protection Circuit Built-In, Capacity: 5000mAh(5Ah), Wh Rating: 18.5Wh, Voltage: 3.7V, Size: 21.5*75.2mm(0.85*2.96 inches), Feature:Type-C Input/Output, Quantity: 2 Pack. This product is NOT sold with restricted lithium-ion standalone batteries. This product does NOT include lithium-ion battery types: 14500, 16340, 18650, 20700, 21700 and 26650
- 【Applicable Device】LBF 21C70 lithium ion battery for led flashlights, headlights, bicycle lights, emergency lights, work lights, loudspeakers, Instrumentation. The USB-C Input/Output battery can be used as an emergency power bank to charge your phone or other devices. It's 21.5*75.2mm, not 21*70mm. Please check whether it is the battery you need before purchasing.
9.6Exceptional
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3
unifun18650 to 21700 Battery Adapter, Converter Adapter for 21700 Flashlight Cases with Metal Contacts 18650 Sleeve Batteries Protective 21700 Battery Adaptor Holder Accessories (2 Battery Converters)
Main highlights- This 18650 to 21700 battery accessories comes with a 5-year warranty and replacement guarantee for any defects or issues. We stand behind the quality of our products and are committed to providing excellent after-sales service.
- ️ This adapter is designed to provide greater flexibility and convenience for flashlight users ect, allowing them to utilize their existing supply of 18650 batteries without having to purchase a new 21700 battery. By simply inserting the 18650 battery into the adapter, users can enjoy the same level of performance and reliability as they would with a specialized battery.
- ️ Divtek 18650 to 21700 battery sleeve is made of ABS material with fire retardant properties, and features highly conductive copper-plated gold battery contacts.
- ️ Divtek 18650 battery tubes are professional battery adapters.Our battery sleeve is designed to provide reliable and safe performance, with high-quality materials and construction that meet industry standards for fire resistance and conductivity. Please note that the weight of this is battery adapter is about 0.25 ounces
- ️ By choosing to use 18650 adapter, users can save both time and money by avoiding the need to purchase new 21700 batteries or dispose of their existing supply of 18650 batteries. This not only reduces waste and environmental impact but also provides a more cost-effective solution for those who already have a large collection of 18650 batteries.
9.3Excellent
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4
DIVTEK18650 to 21700 Battery Adapter, Converter Adapter for 21700 Flashlight Cases with Metal Contacts 18650 Sleeve Batteries Protective 21700 Battery Adaptor Holder Accessories (5 Battery Converters)
Main highlights- This 18650 to 21700 battery accessories comes with a 5-year warranty and replacement guarantee for any defects or issues. We stand behind the quality of our products and are committed to providing excellent after-sales service.
- ️ This adapter is designed to provide greater flexibility and convenience for flashlight users ect, allowing them to utilize their existing supply of 18650 batteries without having to purchase a new 21700 battery. By simply inserting the 18650 battery into the adapter, users can enjoy the same level of performance and reliability as they would with a specialized battery.
- ️ Divtek 18650 to 21700 battery sleeve is made of ABS material with fire retardant properties, and features highly conductive copper-plated gold battery contacts.
- ️ Divtek 18650 battery tubes are professional battery adapters.Our battery sleeve is designed to provide reliable and safe performance, with high-quality materials and construction that meet industry standards for fire resistance and conductivity. Please note that the weight of this is battery adapter is about 0.25 ounces
- ️ By choosing to use 18650 adapter, users can save both time and money by avoiding the need to purchase new 21700 batteries or dispose of their existing supply of 18650 batteries. This not only reduces waste and environmental impact but also provides a more cost-effective solution for those who already have a large collection of 18650 batteries.
9.0Excellent
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5
HUIZHU18650 to 21700 and 20700 Adaptor Battery Storage Container(18650 to 21-700 and 20-700 Adaptor)
Main highlights- adaptor transfer battery 18650 to battery 20700 and 21700
- Copper electrode
- 5pcs pack
8.8Very Good
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6
ImrenIMREN 18650 Battery Charger,21700 Battery Charger for 3.7V 14500 10400 18500 18350 18650 18700 20700 21700 22650 26650 Li-ion Battery,1.2V Ni-MH/Ni-Cd Battery,4 Bay 18650 USB C Battery Charger
9.7 Charging power9.5 safety8.0 DurabilityWhy we love it
Charges multiple battery types simultaneously and separately.
Adjustable charging speeds for faster or slower charge times.
Portable with USB-C for on-the-go charging.
8.7Very Good
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7
BWIETE18650 Battery Charger,21700 Battery Charger,3.7V Lithium ion Rechargeale Battery Charger for 3.7 Volt Battery 18650 18500 18350 10440 14500 16650 16340 20700 21700 26650 Batteries (4 Bay)
Main highlights- Support 4PCS 26650 Battery Charger: The width of the two card slots in the middle is 25 MM, WIDER design, support 4 PCS 26650 batteries charging at the same time.
- 75 MM Long Slot: The 21700 charger has 75 mm slot, support Battery less than 75 mm, such as 21700 20700 26650 18650 battery with botton top.
- 3.7V Battery Charger: Stop charging automatically if the temperature of charger or battery gets too high when charging. Stainless steel rail is more durable and smooth. Worldwide voltage, suitable for the whole world, car adapter is available.
- 21700 Battery Charger: 21700 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.
- 18650 Battery Charger: 18650 rechargeable battery charger Compatible for Li-ion IMR INR ICR 26650 25500 21700 18650 18490 18500 18350 16340 RCR123A 14500 10440 Rechargeable CR123 CR123A Li ion Batteries.
8.5Good
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8
ImrenIMREN 18650 Capacity Tester,18650 Battery Charger with Discharge & Testing Function, 21700 Battery Charger with LCD Screen Display Capacity Suit for 18650 21700 20700 1.2V Ni-MH/Ni-CD LiFePO4 Battery
Main highlights- 【What You'll Get:】 - 1 IMREN 4 bay 3.7V/1.2V battery charger, 1 AC cable,1 Car Charger, user manual, (Do not charge non-rechargeable batteries.)
- 【Practical slot and smart LED】- Short press "SLOT" to view C1, C2, C3, C4, the information displayed on the current screen is the charging status information for each channel. This 21700 battery charger with large screen can show charging capacity, battery voltage, percentage, charging time, easily to understand the charging datum. The 18650 battery charger LCD back-light will become dark after 30 sec. without any operation
- 【C4 Channel 18650 Battery Tester】-Put the 18650 battery into the charger's C4 channel,then Press SLOT and MODE both keys for 2 seconds till flashes.After 5 seconds,it will automatically enter Battery Capacity Analysis Mode.In this mode,the battery is first fully charged,and then discharged at a constant current of 500mAh.After a cycle process of charging and discharging, the capacity of the corresponding battery is displayed on the screen. (only for the C4 channel 18650 battery tester)
- 【Automatic LCD Display】- This is a smart 18650 battery charger with LCD Display, Automatically adjust and choose the best charging current for different batteries to maximize battery life, also could automatically detect Li-ion and Ni-MH batteries at same time or separately. Comes with a car adapter, easily charge your 18650 batteries in your big truck
- 【18650 Battery Charger】- the Battery Charger suit for IMR / Li-ion(4.2V / 4.35V) / 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 / 22500 / 22650 / 25500 / 26500 / 26650 Ni-MH / Cd(1.48V) A AA AAA AAAA C SC.(Support car charge, Includes Car Adapter)
- 【1000mA*4pcs 18650 Battery Charger】- The battery charger with 4 individual speedy charge slots, and the charge current 1000mA*4pcs 18650 Battery. The Charger can Charge 4PCS 3000mAH 18650 batteries at the same time in just 3 hours;The 18650 charger Input：AC 110-240V 50/60Hz, DC 12V
8.4Good
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9
FUGASUN21750 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
Main highlights- 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.
- 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.
- 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 .
- 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 .
8.3Good
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10
CBJJCBJJ 21700 Rechargeable Battery, 3.7 Volt 21700 Battery 5000mAh Flat Top 21700 Li-ion Battery for Flashlight (2 Pack, Black)
Main highlights- Wide Compatibility: These rechargeable 21700 batteries are widely used in various devices, including flashlights, headlamps, path-lights, doorbells , power banks and more. Portable & lightweight items for home use and outdoor use. NOTE: Please fully charge the products before use
- Warm Service: All of products have passed strict testing for normal use. If you have any question, please feel free to contact us, we'll reply email ASAP
- Product Dimensions: 71*21*21 mm(2.80*0.83*0.83 inch). NOTE: This is 3.7v 21700 battery, please refer to the images to confirm the battery model and battery size to select the appropriate battery before purchase
- Multiple Protections: This 3.7v 21700 rechargeable battery is without any memory effect and provide multiple protections,including short circuit, overcharge, and overcurrent protection. Prefectly make the battery to be more stable and safe to protect your devices
- High Performance: This 3.7v 21700 li-ion battery is with 5000mAh large capacity which supports stable power for your devices and effectively prevents damage of the devices, such a perfect replacement battery for used devices with high frequency
8.2Good
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