What you should know about xtar 1.5V Li-ion battery capacity test

XTAR Light

Apr 26, 2010
Some users asked about how to test xtar 1.5V Li-ion batteries' capacity. XTAR Lab uses the high-precision battery capacity grading system to test the real capacity of the 1.5V AA/AAA Li-ion batteries. This measurement method is the best and most precise. Set the constant discharge current needed and the cut-off voltage on the grading system, start to discharge, and record the discharge time. Then calculate the battery capacity with the formula : Q=I*T. Here Q means the quantity of electric charge passing through the battery, i.e. capacity. I means discharging current, and T means discharging time. The result is expressed in ampere-hours (Ah) or milliampere-hours (mAh). While, considering most users may not have the equipment. The electronic load and resistor can also be used in capacity test. It needs to set parameters for electronic load to discharge batteries.

To get the accurate testing results, it's suggested to make triple tests or more and take the average. However, during testing, there are also some factors affecting the test results.

*Ensure a full charge: make sure the batteries are fully charged before testing. It's recommended to use chargers such as XTAR LC4, LC8, L8, L4 and BC4. These chargers have lower cut-off charging currents, ensuring fully charge on the batteries.

*Proper cut-off voltage setting: To test capacity of xtar 1.5V 4150mWh AA Li-ion batteries, pls set the discharge cut-off voltage to 0.8V or below. These batteries still have some capacity at about 1.1V. Setting the cut-off voltage too high would prematurely stop the discharge, resulting in a lower capacity measurement and inaccurate test results.

*Discharge Current Setting: there is a 3.6V cell within xtar 4150mWh AA Li-ion battery, with a built-in voltage step-down chip to 1.5V output. So there is energy loss. With different discharging current, there is a deviation in the conversion efficiency, it's recommended to set discharging current of 0.3-0.5A.

*Other Factors: the capacity of the battery will also be affected by the discharge current deviation, integration deviation, cut-off voltage, battery saturation, and operating room temperature. It is advised to test more than twice and make comparison when you doubt the test result.

XTAR 1.5V AA 4150mWh Battery Test by Admiral134:

XTAR 1.5V AA 3300mWh Battery Test by Tony Albus:

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