Join Date: Oct 2008
Location: Marysville, WA
Bikes: Trek Portland/Gary Fisher Hoo Koo E Koo/LeMond Versailles
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Obviously it has to get power from somewhere, and batteries are a great choice, but how quickly they drain varies quite a lot between different devices. From everything I have read, including here, the fancier Garmin Edge is lucky to get 6 hours of life before needing to be recharged. Other devices can last for much longer. Wired devices typically require less power than wireless ones do (and thus have longer battery life). Powering GPS receivers and receiving telemetry from a heart rate monitor (also wireless) also puts extra strain on battery life.
I am inquiring about the availability of a product with the specific list of less power intensive features in a unit that will not require constant battery maintenance. You knew that, you just opted to be an ass.
FWIW, there are also generators that can supply power. You forgot that option in your completely condescending, and pointless, response.