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[* black] Use a Benchtop Power supply with adjustable voltage and adjustable current limit. Voltage and current meters are necessary too. Example, Topward 3000 series. http://www.topward.com.tw/ps.htm Set the voltage to the higher cell voltage you measuredmeasured, but no more than 4.2V. Set the current limit to 0.5A.
[* black] Use a Benchtop Power supply with adjustable voltage and adjustable current limit. Voltage and current meters are necessary too. Example, Topward 3000 series. http://www.topward.com.tw/ps.htm Set the voltage to the higher cell voltage you measuredmeasured, but no more than 4.2V. Set the current limit to 0.5A.
[* black] Connect the power supply to the cell to be charged up (rebalanced), positive to positive, negative to negative. Crocodile clips are useful for this.
[* black] As the cell charges up the voltage will rise and stop at the set voltage, then the current will start to decrease toward zero. When the current drops to near zero the cell is charged.
[* black] Remove the power supply and repeat the cell voltage measurements.
[* black] Repeat charging on other cells until all cells are within about 0.1V.