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Both the GPS and the phone module is going to be useless while underground, so perhaps it will be better to turn them off altogether and use a separate timer to
by kijin 11y ago
Both the GPS and the phone module is going to be useless while underground, so perhaps it will be better to turn them off altogether and use a separate timer to reconnect them after a few days. A disconnected battery can last quite a long time.
- ghshephard 11y agoEven an energized battery, on a low duty cycle, (Transmitting once a day at low power), can last upwards of 20 years.