Figure 3. Relationship between capacity and resistance as part of cycling. Resistance does not reveal the state-of-health of a modern Li-ion; the internal resistance stays flat.  Combined result of five Li-ion cycled at 1C:  Charge: 1,500 mA to 4.2 V, 25°C Discharge: 1,500 to 2.75 V, 25°C
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