On 08/05/2015 16:28, Brian-Gaff wrote:

Well if you are running a transmitter you gotta use power surely?
Be better off with one that charges up every so often.
Brian

The amount of power required for a tiny burst of data every ten seconds
or so is miniscule. An oil Watchman which sends data much less
frequently lasts many years for example on some very expensive to buy
spares deviously repackaged in copper tube AA Duracell batteries.

The transmitter on my OWL lasts a year to 18 months on a set.

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Regards,
Martin Brown