21700 Secondary Battery 21700 4000mah Lithium Ion Battery Solar Cell Batteries For Energy And Power

Product DescriptionDetailed Parameters of 21700 4000mAhCylindrical Rechargeable Battery Lithium ion NoBattery SizeBattery WrapMaterial
Nominal Voltage,
Volt
Full Voltage,
Volt
Cut-off Voltage,
Volt
Size(mm)
±0.5mm
Capacity,
mAhDiameterHeight110440GreenLi ion3.7V4.25V3.0V1044350mAh214500BlueLi ion3.7V4.25V3.0V1450850mAh314500 with ProtectionBlackLi ion3.7V4.25V3.0V14521380mAh4
16340 /
CR123AGreenLi ion3.7V4.25V3.0V1634750mAh5
21700PinkLi ion3.7V4.25V3.0V21704000mAhDetailed Image of 21700 4000mAh Cylindrical Rechargeable Battery Lithium ion Company Information
Shenzhen Doublepow Energy Technology CO., LTD., specializes in the R&D, manufacture, sales and service of various rechargeable battery, battery charger and consumer electrionics. Established in 2012, located in Shenzhen,China. Our Factory
We are proud of our state of the art facility using advanced processing equipment and is approved by the ISO 9001:2008, which span a total of 10,000 square meters, we can turn out over 2,000,000 pcs batteries and 1,000,000 pcs battery chargers monthly production capacity.Our Team.
Compared to other brands, the most valuable asset of "Doublepow" is our team, we have the most professional and top designers who have been in the battery industry for many years, all they are experienced and famous people in this industry.
Our OEM/ODM team spares no effort to meet the needs of all our customers, whether it's project development, application solutions, or technical support, with customer needs as our top priority.Our Brands
"Doublepow" brand is a professional rechargeable battery manufacturer, we design and manufacture a range of high-quality rechargeable batteries,battery charger and related products.

"Doublepow" products have been quite well-known in the domestic market and inside the industry, more and more consumer selected and use of our products,they can get a very enjoyable experience from the use of our products.Our Products
1. Lithium ion Battery;
2. Ni-MH and Ni-CD,CR2,CR123A Universal Battery;
3. Button Cell Battery(Non-rechargeable);
4. Battery Pack and Other Recycle Rechargeable Batteries;
5. Universal and Multifunctional Battery Charger for 1.2V 3.2V 3.7V 9V Battery;Certifications
As one of the best professional Rechargeable Battery Manufacturers and Suppliers in China, our company and factory have been awarded the certificate for compliance with the standard ISO9001:2000.
We comply with the Battery Standards,all of our batteries has been tested strictly before leaving factory, to ensure that meet the CE, EMC,SGS requirement and RoHS,UN38.3,MSDS,Drop Test and other laws and regulations.Packaging & ShippingLithium BatteriesUN 3480Packing Instruction
The batteries UN3480 are lithium ion batteries, rechargeable, without equipment.
We strictly obey battery transportation rulesUN 3480 and otherRegulations.
Lithium batteries are dangerous goods and, as such, require special packaging for transportation.
All domestic and international shipments containing lithium batteries are subject to transport regulations on hazardous goods according to ADR RID, ADN, IMDG, ICAO / IATA Regulations.FAQ about Battery
Battery GlossaryBattery: Two or more cells connected togetherCell: An electrochemical system that converts chemical energy into electrical energy.Capacity: This is amount of energy a battery cell or battery pack actually provides. The higher the capacity the longer the equipment will run on battery power. Usually measured in Amp hours (Ah) or Milliamp hours (mAh).Battery Charge: This is the process of passing electricity into the battery pack so the pack can be used to provide power when the user is away from mains powerLi-ion: Lithium Ion. This is one the newest battery types available. It can offer the same power as a Ni-MH battery in a smaller and lighter package. This type does not suffer from 'Memory Effect' but it is expensive to manufacture.Ni-Cd: Nickel Cadmium. This is one of the oldest battery technologies that are still in use. Usually found only in older equipment or applications that require a high power drain. Very prone to 'Memory Effect'.Ni-MH: Nickel metal Hydride. This battery type has virtually replaced the Ni-Cd batteries. This type offers higher capacities, around 30% more than a Ni-Cd cell of the same physical size. This type is also reported to suffer less from 'Memory Effect'.Battery Float Voltage: A unit for measuring electrical pressure. All batteries provide DC (Direct Current) electricity. It is important to ensure that the equipment you are powering is being provided with the correct volt or else damage may occur.
Battery Usage TipsNew battery pack must be fully charged before use.New battery pack needs to be fully charged and discharged (cycled) a few times before it can condition to full capacity.Rechargeable batteries undergo self-discharging when left unused. Always store a battery pack in a fully charged staged for storage.Fully drain and fully recharged your battery pack every few months.Don't short circuit terminal or store your battery pack with metal parts.Don't drop or mutilate the battery pack.Don't expose to moisture or water.It is normal to get warm when charging or normal use. If it is getting too hot, there may be a problem with the device and qualified personnel should check it.

Any Battery or accessory you purchase from our company is guaranteed:100% brand new and original manufacturer compatible.Full 1 year warranty.All batteries are made with the high quality cells.A competitive price is our principle.Replacement battery that is as good or often better than the originals.Shopping with us is 100% secure guaranteed!Recommended Battery 18650 lithium ion Rechargeable Battery 2600mAh 3.7v for Electric Power ToolsOEM 2600mAh 18650 Rechargeable Battery Lithium ionwith Micro USB Port
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Deep Cycle 21700 4000mAh Rechargeable Battery Batteries Lithium ion