We made a significantly larger tracking device for monitoring livestock. It can also be used on a larger dog.
The battery of the device is about 3 times larger than the HLT-4.0 device, so the monitoring time of the device with an interval of 10 seconds is about 4 days and the standby time is about 3 months. The weight of the device is 155g.
For the livestock, the tracking device is set to a mode where it sends its location every 30 minutes. In this way, the working time of device about 2 months. The sending interval of the location can be changed by the user.