Brand cells 18650 2S3P 7.4V 9000mAh Li-ion rechargeable battery pack
USD $25 - $35 /Piece
Min.Order:50 Pieces
General Electronics Battery Co., Ltd.
Item |
Parameters | Remark | |
Rated Capacity | Typical | 9000mAh | standard discharge(0.2C) after standard charge |
Minimum | 8500mAh | ||
Alternating Internal Resistance | ≤70mΩ | ||
Nominal Voltage | 7.4V | mean operation voltage | |
Voltage at end of Discharge | 6.0V | discharge cut-off voltage | |
Charging at end of Voltage | 8.4V | ||
Standard Charge | Constant Current 0.2C Constant Voltage 8.40V 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 8.40V 0.02C5A cut-off | charge time:Approx 2.5h | |
Fast Discharge | Constant Current 1C end Voltage 3.0V | ||
Cycle Characteristic | 500 times(80%DOD) | the residual capacity is no less than 80% of rated capacity at 1C rate. | |
Maximum Continuous Discharge Current | 1C | pulse discharge current: 2C | |
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 |
Key Features
Intelligent Battery Pack Design
Environmental Friendly Chemistry
High Energy Density
High Power Density
Fast Charge Capability
Excellent Cycle Life
Main Applications
Video Devices:MP3/MP4/MP5,digital camera,portable DVD,portable television,electronic cigarettes,electricity sound box,ect.
Portable Devices:GPS,PDA,E-book,PMP,PSP,laptop,walkie-talkies,portable medical device,etc.
Illuminate Devices:Miner lamp,search light,ect.
Others:Electric Toys,RC models,model aircraft,backup power,mobile power supply,hand electric drill,ect.
Precautions and Safety Instructions of Cylindrical Li-ion Battery
Storage of Cylindrical Li-ion Battery
General Electronics Battery Co., Ltd.
is a Sino-American jointventure company integrates R&D, manufacture and sales
Fortune Global 500 lithium battery customers special supplier
Over 1000 different sizes and capacities of batteries
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.