2600mAH cell is coming back! This cell is commonly use in 5200mAh or 56Whr battery pack. Higher real capacity than most battery you could possible found somewhere else! Give you more standby time, quality assured or your money 100% back.
Real capacity calculated:
--------------New Graph Initialized at 2/10/2010 3:46:10 PM--------------
2/10/2010 3:46:11 PM;12606;0;5200;31649.89;2573.132;100;118;30.85;4200;4202;4204;0
2/10/2010 3:46:21 PM;12606;0;5200;0;0;100;118;30.85;4200;4202;4204;0
2/10/2010 3:46:31 PM;12333;-3066;5198;0;0;100;118;30.85;4118;4098;4114;0
2/10/2010 3:46:41 PM;12298;-3064;5189;-104.9032;-8.516665;100;118;30.95;4107;4087;4102;0
2/10/2010 3:46:51 PM;12274;-3064;5180;-209.515;-17.03;100;118;30.95;4099;4080;4095;0
2/10/2010 3:47:02 PM;12257;-3064;5172;-313.9379;-25.54222;99;118;31.15;4093;4074;4089;0
2/10/2010 3:47:12 PM;12242;-3064;5163;-418.2296;-34.05555;99;117;31.15;4088;4069;4084;0
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2/10/2010 5:27:21 PM;9331;-3070;26;-55988.05;-5067.858;1;1;45.05;3120;3093;3115;0
2/10/2010 5:27:31 PM;9267;-3070;26;-56059.46;-5075.533;1;1;45.15;3100;3071;3095;0
2/10/2010 5:27:41 PM;9196;-3070;26;-56138.25;-5084.059;1;1;45.15;3075;3047;3071;0
2/10/2010 5:27:51 PM;9118;-3070;26;-56216.43;-5092.584;1;1;45.15;3048;3020;3046;0
2/10/2010 5:28:01 PM;9032;-3070;0;-56293.9;-5101.111;0;0;45.35;3019;2989;3018;0
Discharge begin(12.606V): 3:46:31
Discharge End(9.032V): 5:28:01
Discharge current: 3.070A+/-1% maximum 3.1A, minimum 3.04A
Time elapsed: 1:41:30 (1hour41minutes30seconds)
Maximum Discharged Capacity (+1% error): 5208mAH (2604mAH per cell)
Minimum Discharged Capacity (-1% error): 5107mAH (2554mAH per cell)
End of Discharge Temperature: 45.35 Degree Celsius
Ambient Temperature: ~30 Degree Celsius
Please note that it is done at fast discharge for testing purpose, to show these battery cell is capable of doing high current discharge and have lower impedance which suitable for notebook battery pack. Most notebook by default only draw less than 2A current when automatic power management turn on, which usually last up to double the runtime as tested figure.
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*Please check your battery original capacity to comfirm will it perform better than your original battery! For example if your battery is 6 cell and labeled 40Whr, this cell will perform 56/40=140%, 40% extra runtime compare to your original battery! *6 cell battery that have original runtime (mean at the time when you just bought a new laptop) of less than 1 hour is not recomanded to do any upgrade of capacity. As the gain is not significant and battery can getting too hot because these high energy density cell have lower power density, i.e.it is designed to discharge at more than 2 hours.
*For a 6 cells battery pack, with power saving feature turn on, most user can get 3-4hours runtime in centrino system, 4-8hours in Atom system, 2-3hours in core2duo, Pentium mobile CPU, AMD mobile CPU or other common and less than 17inch laptop. Laptop that using destop CPU usually come with 8 cell battery and it runtime is usually 1-2hours only. Any laptop that have screen size of 17inch or bigger will also not having long battery runtime.
*Results above showing the result for the first time used only, any subsequences cycle will not degrade the cell more than 1Whr per cycle if the cycle interval is less than 1 months and rest time is more than 1 hour before charge it back. Conclusion is made base on basic test of cell under room temperature. There is however, the rate of degrade per cycle become more obvious if the cell is keep fully-charged or full-discharged for a long period such as few months or years, which could make it degrade more than 10Whr per cycle.
*Battery will not longer learn meaningful capacity that can report the real runtime after the impedance become too high, because the battery discharge dv/dt rate will never reach qualified learning rate anymore. Battery that have it crystallize structure damaged usually show this symptom due to increasing of cell impedance. Cheaper cell have the crystal link break faster.
*Results above showing the result for the first time used only, any subsequences cycle will not degrade the cell more than 1Whr per cycle if the cycle interval is less than 1 months and rest time is more than 1 hour before charge it back. Conclusion is made base on basic test of cell under room temperature. There is however, the rate of degrade per cycle become more obvious if the cell is keep fully-charged or full-discharged for a long period such as few months or years, which could make it degrade more than 10Whr per cycle.
*Battery will not longer learn meaningful capacity that can report the real runtime after the impedance become too high, because the battery discharge dv/dt rate will never reach qualified learning rate anymore. Battery that have it crystallize structure damaged usually show this symptom due to increasing of cell impedance. Cheaper cell have the crystal link break faster.
*Under lower temperature, any Li-ion cell generally release/store less energy that it actually capable as if under room temperature.
*All of the informations above is given based on my previous knowledges and experiences, may contain mistakes or may not up to date. Shall you have any question kindly contact me by the following email: mail.altbattery@gmail.com.
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