Guang Zhou Sunland New Energy Technology Co., Ltd.
| Supply Ability | 100000PCS EACH WEEK |
| Delivery Time | 7-10 days after order confirm for stock model |
| Packaging Details | meet UN38.3 Certification |
| material | lithium ion battery |
| voltage | 3.7v |
| capacity | 4000mah-5000mah |
| discharge rate | 0.2C |
| Size | D: 21mm H:70mm |
| circle life | 500 times |
| Current | Max discharge current 0.2C |
| warranty | 12 months |
| color | purple \ blue and OEM |
| positive type | flat and top |
| Payment Terms | 30% advance for battery Pack |
| Brand Name | TAC OEM & ODM |
| Model Number | 21700 400mah 3.7v |
| Certification | MSDS REACH ROHS |
| Place of Origin | Shenzhen zhuhai |
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Product Specification
| Supply Ability | 100000PCS EACH WEEK | Delivery Time | 7-10 days after order confirm for stock model |
| Packaging Details | meet UN38.3 Certification | material | lithium ion battery |
| voltage | 3.7v | capacity | 4000mah-5000mah |
| discharge rate | 0.2C | Size | D: 21mm H:70mm |
| circle life | 500 times | Current | Max discharge current 0.2C |
| warranty | 12 months | color | purple \ blue and OEM |
| positive type | flat and top | Payment Terms | 30% advance for battery Pack |
| Brand Name | TAC OEM & ODM | Model Number | 21700 400mah 3.7v |
| Certification | MSDS REACH ROHS | Place of Origin | Shenzhen zhuhai |
| High Light | lithium iron phosphate battery pack ，3.7v lithium ion battery | ||
Specification for 21700 Lithium Battery For Electrical Vehicle 3.7V 4000MAH
| No. | Items | Specifications | Remark | |
| 1 | Nominal Capacity | 4000mAh-5000mAH | 0.5C Standard discharge | |
| 2 | Minimum Capacity | 3800mAh-4800mAh | ||
| 3 | Nominal Voltage | 3.7V | Mean Operation Voltage | |
| 4 | Delivery voltage | 3.70~3.9V | Within 10 days from Factory | |
| 5 | Charge Voltage | 4.2V±0.03V | By standard charge method | |
| 6 | Standard charging method | 0.5C constant current,4.2V constant voltage charge to 4.2V,continue charging till current decline to ≤0.01C |
| |
| 7 | Charge current | 0.2C | 400mA | Standard charge, charge time about 7h(Ref) |
| 0.5C | 2000mA | Rapid Charge, charge time about: 3.5h(Ref) | ||
| 8 | Standard discharging method | 0.5C constant current discharge to3.0V, | ||
| 9 | Cell Internal Impedance | ≤50mΩ | Internal resistance measured at AC 1KHZ after 50% charge | |
| No | Items | Test Method and Condition/ | Criteria | |
| 1 | Rated Capacity at 0.2C(Min.) | After standard charge, the capacity shall be measured on 0.2C discharge till the voltage discharge to3.0V, | ≥3800mAh | ≥100% |
Rated Capacity at 0.5C(Min.) | After standard charge, the capacity shall be measured on 0.5C discharge till the voltage discharge to 3.0V, | ≥3686mAh | ≥98% | |
Rated Capacity at 1C(Min.) | After standard charge, the capacity shall be measured on 1C discharge till the voltage discharge to 3.0V, | ≥3534mAh | ≥96% | |
| 2 | Cycle Life | Charging and discharging battery as blew conditions | ≥80% of initial capacity | |
| 3 | Capacity retention | The battery to be charge in accordance with standard charge condition at 20~25℃,then storage the battery at an ambient temperature 20~25℃ for 28 days. | Retention capacity | |
Application for 21700 Lithium Battery For Electrical Vehicle 3.7V 4000MAH
20-50 pcs each box and 4 box pcs in one standard export carton
Tac Also support display box and specially color carton for OEM ODM order
7-10 days for bulk cell base on industry pack , this is normal model , we prepare the stock continue
25-30 days for battery pack after the customer confirm the detail accessories for examples PCB Connector etc.
The period of warranty is one year from the date of shipment. We guarantees to give a case of cells with defects proven due to manufacturing process instead of the customer abuse and misuse.
The batteries should be stored at room temperature, charged to about 30% to 50% of capacity.
We recommend that batteries be charged about once per half a year to prevent over discharge.
| MODEL | CAPACITY | VOLATGE |
| ICR10440 | 250-400MAH | 3.7V |
| ICR14500 | 450-600MAH | 3.7V |
| ICR17335 | 750-900MAH | 3.7V |
| ICR18490 | 1100-1500MAH | 3.7V |
| ICR18500 | 1500-1800MAH | 3.7V |
| ICR18650 | 2000-2800MAH | 3.7V |
| ICR26650 | 3000-3300MAH | 3.7V |
| ICR20700 | 3500MAH | 3.7V |
| ICR21700 | 4000MAH-5000MAH | 3.7V |
Normally 21700 Cell positive is flat type , but we can support both of flat type and top type
Flat Type
TOP Type
Company Details
Business Type:
Manufacturer,Importer,Exporter
Year Established:
2011
Total Annual:
10 USD Million-15 USD Million
Employee Number:
1000~2000
Ecer Certification：
Verified Supplier
Guangzhou Sunland New Energy Technology Co., Ltd. (Sunland Power) is a senior professional service provider of battery application. Aiming at serving industrial users, it is dedicated to providing industrial users with optimized battery supporting solutions and safe, environmental friendly and cost-... Guangzhou Sunland New Energy Technology Co., Ltd. (Sunland Power) is a senior professional service provider of battery application. Aiming at serving industrial users, it is dedicated to providing industrial users with optimized battery supporting solutions and safe, environmental friendly and cost-...
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