|Place of Origin:||guangzhou|
|Minimum Order Quantity:||5000pcs|
|Price:||USD 3 each pcs|
|Packaging Details:||20pcs/ inner box , 5 box/ carton|
|Delivery Time:||10 work days|
|Supply Ability:||300000pcs /month|
|Size:||D; 21mm H:70mm||PVC Color:||Blue Or OEM|
|Circle Life:||500 Times||Current:||Max Discharge Current 0.2C|
|Warranty:||12 Months||Application:||Energy Storage System|
The model 21700 is the newest design for Lithium ion Cylindrical Battery, the size follow Samsung, and the performance similar with Tesla , the energy density rise20% than normal lithium-ion battery , and the cost down 9%
0.5C Standard discharge
Mean Operation Voltage
Within 10 days from Factory
By standard charge method
Standard charging method
|0.2C constant current,4.2V constant voltage charge to 4.2V,continue charging till current decline to ≤0.01C||
Standard charge, charge time about 7h(Ref)
Rapid Charge, charge time about: 3.5h(Ref)
Standard discharging method
|0.2C constant current discharge to3.0V,|
Cell Internal Impedance
Internal resistance measured at AC 1KHZ after 50% charge
|No||Items||Test Method and Condition/
Rated Capacity at 0.2C(Min.)
After standard charge, the capacity shall be measured on 0.2C discharge till the voltage discharge to3.0V,
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,
Charging and discharging battery as blew conditions
0.2C standard charge to 4.2V end-off
0.2C standard discharge to 3.0V cut-off
Continuous charge and discharge for 300 cycles ,the capacity will be measure after the200th cycle
|≥80% of initial capacity|
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.
Measure the capacity after 30 days with 0.2C at 20~25℃ as retention capacity
Application for 21700 Lithium Battery For Electrical Vehicle 3.7V 3000MAH 30C
20-50 pcs / box and 4 box pcs/ export carton
Display and specially color carton are workable of OEM ODM order
The pack meet international transportation require , and the outer carton is hard and nice.
If the customer order normal industry pack base on blue pvc and printing, Tac can delivery with 7-10 days
if the order is OEM for bulk or battery pack, TAC can delivery the 25-30 days after confirm the detail including of the pcb wire and connector etc.
The period of warranty is 12 months from the batteries shipped out from factory. We guarantees replace the good production or return the payment as long as the reject reason because of our quality.
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.
and more pls check our website Http://www.tacbattery.com