wishingwellphotos Posted February 26, 2009 Share Posted February 26, 2009 <p>Does anyone know what the enternal battery life is on a pentax 645 ? I am not talking about the grip batterys.</p> Link to comment Share on other sites More sharing options...
q.g._de_bakker Posted February 26, 2009 Share Posted February 26, 2009 <p>John,</p> <p>I'm sorry, but i don't have the answer.<br />I do notice however that your question about a Pentax 645 is tagged "Mamiya 645" by Photo.net.<br />The advertising on the page picked up that it is about a Pentax. But perhaps your question may not catch the attention of people who would know the answer because of it? Perhaps a repost might help?</p> Link to comment Share on other sites More sharing options...
jim_momary Posted February 27, 2009 Share Posted February 27, 2009 <p>From a purely engineering perspective, I would say 10 years if it is a lithium coin-type cell. Most PCs and all our lab and portable gear at the factory is so equipped. I seldom, if ever have to replace them in the instrument's useful lifetime. On our larger and more critical vacuum deposition systems we routinely change them every 3 years. Those particular Allen Bradley controlled units seem to have a life only a bit over 4 years. This is all anecdotal, I don't know about your camera directly.</p> <p>Jim.</p> Link to comment Share on other sites More sharing options...
danny_wong2 Posted February 27, 2009 Share Posted February 27, 2009 <p>The first internal battery in my Pentax 645 lasted about 7 years.</p> Link to comment Share on other sites More sharing options...
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