6S 22.2V to 25.2V. 7S 25.9V to 29.4V. 3S 11.1V to 12.6V. 5S 18.5V to 21V. 2S 7.4V to 8.4V. 1S 3.7V to 4.2V. 1x Lithium Battery Level Indicator Tester (Select the number of cells above). · Li-ion Lithium Battery Level Indicator.
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