A method (800, 900) comprising: monitoring a gas analyte using a monitoring system capable of monitoring lithium ion battery off-gas, wherein the gas analyte comprises a lithium ion battery electrolyte material released by one or more lithium ion batteries; generating a sensor signal characterizing an amount of the gas analyte; receiving the sensor signal; evaluating the sensor signal relative to a threshold, wherein the sensor signal is generated during a first state of the one or more lithium ion batteries, the first state corresponding to a state wherein the one or more lithium ion batteries are releasing the gas analyte; generating one or more baseline sensor signals characterizing an amount of the gas analyte being released during a second state of the one or more lithium ion batteries, the second state corresponding to a state wherein the one or more lithium ion batteries are not releasing the gas analyte; applying a moving average to the one or more baseline sensor signals to determine a MA threshold; determining a given band threshold at K times the standard deviation of the one or more baseline sensor signals one of above and below the MA threshold; determining a sensitivity threshold based on the MA threshold and a difference value between a minimum sensitivity and a reference; comparing the sensitivity threshold relative to the given band to identify a threshold having a greatest value; wherein evaluating the sensor signal relative to the threshold comprises evaluating the sensor signals relative the threshold having the greatest value; and generating an alert signal based on a result of the evaluation. monitoring a gas analyte using a monitoring system capable of monitoring lithium ion battery off-gas, wherein the gas analyte comprises a lithium ion battery electrolyte material released by one or more lithium ion batteries; generating a sensor signal characterizing an amount of the gas analyte; receiving the sensor signal; evaluating the sensor signal relative to a threshold, wherein the sensor signal is generated during a first state of the one or more lithium ion batteries, the first state corresponding to a state wherein the one or more lithium ion batteries are releasing the gas analyte; generating one or more baseline sensor signals characterizing an amount of the gas analyte being released during a second state of the one or more lithium ion batteries, the second state corresponding to a state wherein the one or more lithium ion batteries are not releasing the gas analyte; applying a moving average to the one or more baseline sensor signals to determine a MA threshold; determining a given band threshold at K times the standard deviation of the one or more baseline sensor signals one of above and below the MA threshold; determining a sensitivity threshold based on the MA threshold and a difference value between a minimum sensitivity and a reference; comparing the sensitivity threshold relative to the given band to identify a threshold having a greatest value; wherein evaluating the sensor signal relative to the threshold comprises evaluating the sensor signals relative the threshold having the greatest value; and generating an alert signal based on a result of the evaluation.