This study presents laboratory results on the electrical performance of lithium‑ion batteries with different chemistries discharged at a constant current of 0.2C. The influence of ambient temperature (25°C and 0°C) and the state of charge (SoC) on the load voltage and usable capacity is analyzed.

The experimental results show that within the 20–80% state of charge (SoC) range, all tested cells exhibit stable voltage regardless of temperature conditions. At 0°C, the open‑circuit voltage (OCV) remains within 3.2–3.5 V, confirming that the cells retain operational capability at low temperatures, albeit with reduced usable capacity. Deviations between nominal manufacturer specifications and measured data were observed, most likely due to increased internal resistance and temperature‑related effects.

The results confirm that the 20–80% SoC range is optimal for stable operation of lithium‑ion batteries, including at low temperatures, and is particularly relevant for assessing remaining useful life and suitability for second‑life applications.