10 Best 21700 Diy Battery In The Us - Black Friday 2024
Button 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.
9.8Exceptional
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Value for Money2
PULUZ2-in-1 Cell Phone Wireless Charger Mobile Power Battery Charger Set,Portable Battery Charger with LCD Display and 2 USB Output Ports，DIY 4 * 21700 Solderless White Battery Box(Battery Not Included)
Main highlights- 【Reliable Customer Service】A good product is of course inseparable from a good service, if you have any questions about this product, please feel free to contact us. Our reliable customer service will reply you within 24 hours to provide you with a satisfactory solution.
- 【Multi-Function and Flexible Use】The portable charger has 2 USB output ports, with mobile phone wireless charging function, supports 22.5W+15W wireless charging, supports two-way fast charging, charging current up to 5A, efficiency up to 96%, suitable for Apple/Huawei/Samsung /Xiaomi/OPPO/vivo and other mobile phone fast charging.
- 【LCD Screen Display】The battery box has an LCD screen display, which accurately displays the battery power, and you can check the battery power status at any time. With LED indicator light, it provides effective instructions for your use. The power output uses the USB port. Plug in the data cable to achieve portability and charge at any time.
- 【Effective Security Protection】The battery box supports temperature loop control, automatic load detection/light load detection, input overvoltage, undervoltage protection, output overcurrent, overvoltage, short circuit protection, battery overcharge, overdischarge, and overcurrent protection. , IC over-temperature protection allows you to charge with confidence and use with peace of mind.
- 【DIY Mobile Power Supply】Large capacity, you can make a mobile power bank by placing 4 21700 flat-head batteries (battery not included in this product). The battery box can charge your battery or be used with the battery as a mobile power supply. on your mobile phone and other devices. (Note: Please pay attention to the positive and negative terminals of the battery)
9.7Exceptional
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3
QimooQimoo 3.7V 21700 Lithium Battery 4500mAh-16.65Wh Rechargeable Battery Pack 1S1P Lithium Ion Batteries with PH2.0mm Connector for DIY Electronics Products, Toys, Lighting, Bluetooth Equipment
Main highlights- The 4400mah-16.65Wh rechargeable li-ion battery pack is suitable for 3.7V~4.2V devices. For example, DIY electronic products, Bluetooth speakers, toy cars, solar outdoor lights, medical equipment, power tools, etc.
- Specifications: Model: 21700. Capacity : 4500mAh; Size: 70x17x17mm/2.75x0.67x0.67inch ; Weight: 95g ;wattage : 16.65Wh; Type of plug: PH2.0mm ;Cable Length: 10cm / 3.9".
- Performance: The 3.7volt lipo battery has consistency in voltage, internal resistance (20mΩ) and capacity. Ensure the stability and durability of the battery. Long discharge time and high cycle times. Normal charging and discharging 300 times can still maintain 85% of capacity.
- Package Content: 1 x 4500mAh-16.65Wh high capacity lithium ion batteries.
- Notice: Make Sure Device Polarity Matches with Battery Pack Connector Before Purchase!!!-1.Battery Size; 2.Connector Model; 3.Connector Size; 4.Connector Polarity - THIS IS NOT UNIVERSAL!!! (It will cause a shortage if the polarity of the battery connector does not match your device.)
9.6Exceptional
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4
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
9.5Excellent
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5
EcoSolutionsEcoSolutions 21700 Rechargeable Battery Case Set, 2pack 5000mah Large Capacity 3.6Volt 21700 Tip Battery for flashlights ect,
Main highlights- Widely Compatible: 5000mAh 21700 Rechargeable battery large capacity,Which can be widely used for electronic devices, such as LED flashlights, emergency lights, portable devices, headlights, toys, remote controls, etc.
- Reliability and Durability: High-quality manufacturing processes and materials ensure the stability and durability of it, allowing them to perform exceptionally well in various environments and usage conditions.
- Product Size: 21*21*70 mm (0.82*0.82*2.75 inches),it's a 3.6 volt rechargeable battery, please check carefully before purchasing !).Please confirm whether the battery model required by your device.
- Large capacity: 21700 battery With a capacity of 5000mAh and voltage of 3.6v battery, high capacity battery with low discharge rate, high power consumption, high energy density and pollution-free design, No need to change batteries frequently.
- Enjoy our warm after-sales service: If you encounter any issues, don't hesitate to reach out to us. We're committed to resolving them for you promptly.
9.2Excellent
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6
FielectFielect 20Pcs 4x5 Cell Spacer 21700 Lithium Battery Plastic Holder Bracket for DIY Battery Pack 21.7mm Hole Dia
Main highlights- [Type]- Series Mode: 4*5 21700 Battery Holder Cell Spacer; For: 21700 Lithium Battery; Hole Spacing: 23mm/0.9"; Hole Dia: 21.7mm/0.85".
- [Function]- Battery holder 21170 belong to necessary support of high-end battery combination, can withstand high drop, high strength support, easy to heat dissipation, convenient combination, fixed specifications, and free combination.
- [Features]- Cylindrical 18650 battery holder, fire retardant pc pp gp materials; Crack resistant edge with the slot, with the firm, It can accomodate various size.
- [Advantage]- 21700 battery holder has card slot at edge, the same model multi -shape random stitching combination, match up firm, with strong, and no need for other device connected by vibration test.
- [Aapplication]- With professional 21170 battery holder to replace the traditional general adhesive, which would brings convenient combination and more firm connection, as well as brings convenient maintenance of the battery, its the best choice of the battery combination.
9.0Excellent
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7
BFHBBFHB 21700 Battery Case Set 5000 mAh for Flashlight - 2 Pack
Main highlights- Wide Compatibility - With the standard size, these batteries are compatible with many flashlight brands and other electronic devices, including LED torches, portable devices, headlights, toys, cameras and other household appliances. Providing users with a broader range of choices and flexibility.
- Reliability and Durability - High-quality manufacturing processes and materials ensure the stability and durability of it, allowing them to perform exceptionally well in various environments and usage conditions.
- Precision Design - Tailored for flashlights, these batteries set are seamlessly integrated with their corresponding battery cases, offering a safe and efficient power solution to keep devices operating optimally when needed.
- Ensuring reliable power for extended durations, making it an ideal choice for various devices.
- Enjoy our warm after-sales service: If you encounter any issues, don't hesitate to reach out to us. We're committed to resolving them for you promptly.
8.8Very Good
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8
BistookBistook DIY 1 Slot 3.7V 21700 Battery Box Battery Holder Battery Slot can be Spliced and Assembled Freely Plastic Material (6pcs 1-Slot)
Main highlights- Versatile Connection Options: Our 21700 battery holder can be linked in series or parallel, offering flexible configurations with included copper connectors to meet diverse needs.
- Premium Quality Materials: Crafted from durable PC+ABS material, with pure copper M3 screws for positive and negative terminals, this holder minimizes resistance. It supports a high current of up to 5A (max) and allows hassle-free use without soldering.
- Innovative Interlocking Design: Each battery case features a clear cover for added protection, enabling unlimited stacking and creative combinations, reminiscent of building blocks.
- Customer Care and Assurance: Suitable for DIY enthusiasts; batteries not included. We recommend using consumer-grade 21700 flat-top lithium batteries. This product comes with a 30-day return policy for a full refund or replacement in case of any issues. For inquiries, our team is available 24/7 to provide prompt and satisfactory solutions.
- Broad Applicability: Specifically designed for single 21700 3.7V flat-top cylindrical lithium batteries. Easily transform the battery box into a portable power bank by adding a circuit board. Ideal for various electronic projects, this holder not only sparks creativity but also delivers convenience and satisfaction.
8.6Very Good
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9
EcoSolutionsEcoSolutions 21700 Rechargeable Battery Case Set, 5000mah Large Capacity 3.7Volt 21700 Flat Top Battery for flashlights ect, 2 Pack
Main highlights- Widely Compatible: 5000mAh 21700 Rechargeable battery large capacity,Which can be widely used for electronic devices, such as LED flashlights, emergency lights, portable devices, headlights, toys, remote controls, etc.
- Product Size: 21*21*70 mm (0.82*0.82*2.75 inches),it's a 3.7 volt Flat Top rechargeable battery, please check carefully before purchasing !).Please confirm whether the battery model required by your device.
- Multiple Protections: This flat top rechargeable battery is without memory effect and provide safe protections to protect your devices,including short circuit, overcharge, and overcurrent protection. NOTE: Please fully charge the products before use
- Large capacity: 21700 battery With a capacity of 5000mAh and voltage of 3.6v battery, high capacity battery with low discharge rate, high power consumption, high energy density and pollution-free design, No need to change batteries frequently.
- Enjoy our warm after-sales service: All of our products have passed strict testing for normal use. If you encounter any issues, don't hesitate to reach out to us. We're committed to resolving them for you promptly.
8.5Good
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10
JichuET200mm(7.9in) Width PVC Heat Shrink Wrap Tube 18650 21700 26650 Lithium Battery DIY Battery Pack 3M(9.9ft) Length Blue
Main highlights- Size: 200mm(7.9in) Wide, 3M(9.9ft) Length, Thickness is 0.15mm;
- Shrinkage Temperature: 90-110(℃); Shrinkage Rate: 48% (cross-section), 5% (longitudinal);
- Material: PVC Heat Shrinkable;
- Application: used for 18650 21700 26650 Lithium Battery DIY Battery Pack and enhance electrical insulation.
- Advantages: Insulation Protection, Fast Shrinkage, Multiple Applications;
8.2Good
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