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3.7v 2400mah shenzhen 18650 lipo battery
Item |
Parameters | Remark | |
Rated Capacity | Typical | 2400mAh | standard discharge(0.2C) after standard charge |
Minimum | 2350mAh | ||
Alternating Internal Resistance | ≤70mΩ | ||
Nominal Voltage | 3.7V | mean operation voltage | |
Voltage at end of Discharge | 2.5V | discharge cut-off voltage | |
Charging at end of Voltage | 4.20V | ||
Standard Charge | Constant Current 0.2C Constant Voltage 4.20V 0.02C cut-off | charge time:Approx 6.0h | |
Standard Discharge | Constant Current 0.2C end Voltage 3.0V | ||
Fast Charge | Constant Current 1C Constant Voltage 4.20V 0.02C5A cut-off | charge time:Approx 2.5h | |
Fast Discharge | Constant Current 1C end Voltage 3.0V | ||
Cycle Characteristic | 2000times(100%DOD) 4000 times(80%DOD) 7000 times(50%DOD) | the residual capacity is no less than 80% of rated capacity at 1C rate. | |
Maximum Continuous Discharge Current | 2C | pulse discharge current: 5 C | |
Operation Temperature Range | Charge:0~55℃ Discharge:-20~60℃ | 60±25%R.H. bare battery | |
Storage Temperature Range | Less than 1 year:-20~25℃ Less than 3 months:-20~45℃ | 60±25%R.H. at the shipment |
Advatages:
1.Best price
2.Fast delivery
3.Top quality
4.First class after - sales service
5.No memory effect
6.High energy density
7.Long cycle life
Shipping:
1. We will ship the products within 15 workdays after receipt of payment.
2. We can ship to you by UPS/FEDEX/DHL and so on. Other shipping terms can also be arranged according to specific requirements.
3. We are not responsible for any accidents, delays or other issues that are the responsiblility of the shipping service.
Payment:
1.We accept T/T , PAYPAL , Western Union, Cash and so on.
2.If you prefer other payment terms,please contact us.
Replacement Policy:
1.We provide one year warranty.
2.If items is defective , please notify us within 3 days of delivery
3.Any items must be returned in their original condition to qualify for a replacement.
4.The buyer is responsible for all the shipping cost incurred.
Precautions and Safety Instructions of Cylindrical Li-ion Battery
Storage of Cylindrical Li-ion Battery
We participate in a variety of trade fairs twice every year .On Electronics Show we discuss with customers
about our products and help them solve questions face to face.We have established contacts with many
potential buyers from other places as America, Australia, Belgium, Israel,Germany, the Netherlands,
Canada etc.
1. Q: What is minimal rated capacity?
A: minimal rated capacity is the capacity on 0.2 C discharge till the voltage tapered to 2.0V shall be measured after rested for 30min then finish standard charge.
2. Q: What is internal impedance?
A: Internal impedance is measured at AC 1KHz after 50% charge.
3. Q: What is standard charge?
A: Charging shall consist of charging at a 0.2 C constant current rate until the cell reaches 4.20V. The cell shall then be charged at constant voltage 0f 4.20 volts while tapering the charge current Charging shall be terminat ed when the charging current has tapered to 0.02 C. Charge time:Approx 6.0h,The cell shall demonstrate no permanent degradation when charged between 0℃ and 45℃
4. Q: What is standard discharge?
A: Batteries shall be discharged at a constant current of 0.2 C to 3.0 volts @20℃±5℃. If no otherwise specified, the rest time between Charge and Discharge amount to 30min.
5. Q: What is overcharge?
A: After normal charge, test the batteries’ initial state and capacity. Charge to 10.0V at 3C, then charge at CV mode to 0.01C. Observe battery’s variation of appearance.
6. Q:What is over discharge?
A: After normal charge, test the batteries’ initial state. When the batteries are normal, Discharge to 0V at 0.5C. Observe battery’s variation of appearance.
7. Q: What is external short-circuit?
,A: After normal charge, test the batteries initial state, Keep the battery into explosion protection cover, short- circuit the positive and negative terminals directly (general resistance shall be less than or equal to 50mΩ). Sto p the test when the temperature falls to 10℃ lower than the peak value. Observe the variation of the batteries’ appearance and temperature.
8.Q:How are chargers selected?
A:Selecting principles of chargers is as below:
(1)Voltage should be regulated by the safest voltage of chargeable cell * n (make the Lithium iron phosphate as 3.6 V and Ni- Co- Mn as 4.2 V);
(2)Current should be limited by the safe current of chargeable cell, and the customers’specific requirements also should be considered.
(3)If above 120W,chargers with aluminum alloy cooling fin or cooling fan will be suggested.
(4)If under 60W,chargers with plastic shell will be suggested.