Battery methods for use with telematics

A method of operating a telematic monitoring device and a battery device electrically coupled to the telematic monitoring device, the telematic monitoring device operable in a sleep mode where activity of the telematic monitoring device is limited and an awake mode where the telematic monitoring device is operable to transmit a wireless signal, the battery device including control circuitry, at least one battery, and at least one temperature sensor, the battery device operable in a low-power mode where the control circuitry is inactive and a measurement mode where the control circuitry is operable to analyze temperature data from the temperature sensor, the method comprising:

• during operation of the control circuitry in the low-power mode, transitioning the control circuitry to operate in the measurement mode after a set period, where the set period is initially a first duration;
• during operation of the control circuitry in the measurement mode:
• comparing a first temperature of the battery indicated in the temperature data from the temperature sensor to a first threshold, and sending a first alert to the telematic monitoring device if the first temperature of the battery exceeds the first threshold;
• comparing the first temperature of the battery indicated in the temperature data from the temperature sensor to a second threshold lower than the first threshold;
• if the first temperature of the battery is higher than the second threshold and below the first threshold, setting the set period to a second duration shorter than the first duration;
• and
• transitioning the control circuitry to operate in the low-power mode if the first temperature of the battery is less than the first threshold;
• and
• during operation of the telematic monitoring device in the sleep mode, in response to receiving the first alert from the battery device, transitioning the telematic monitoring device to operate in the awake mode to transmit a second alert to a remote device.