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Hobbies & Interests
Watches / Timepieces
A Citizen Eco-Drive lack of info gripe...
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<blockquote data-quote="mtngunr" data-source="post: 4368000" data-attributes="member: 46104"><p>For any one or two who followed my incessant whining on making sure a 10mth old new watch of possible near empty charge was fully charged for winter under sleeves, outside of a few hours nightly under a low wattage LED bedside lamp...</p><p></p><p>And the wildly varying amounts of charge time through window glass (28-90hrs) given by two manufacturer sources...</p><p></p><p>One source flatly stated the low charge available thru a window was due to filtering and coatings, assumedly them using city building glass/Tokyo code glass/whatever.</p><p></p><p>My windows are plain glass, single pane, unfiltered past dust on exterior or losses from reflection with sun at an angle.</p><p></p><p>Found that plain glass of normal pane thickness exceeds 90% light transmission dead on, drops to 70% at a 30° angle...</p><p></p><p>Assuming a worst case only 50% getting through glass, and worst case of only saying light entering was worth a damn only between 10am-2pm on a south facing window, I would be getting 2hrs equiv full outdoor sunlight per day...</p><p></p><p>Conflicting maker manuals say 7hrs and 12hrs of full outdoor sunlight to fully charge a dead battery (assumedly pointed dead at sun for all that time, which is impossible while wearing)....</p><p></p><p>my worst case 2hrs equiv. full sunlight per day would be six days max, and I made sure the watch was in the window on sunny days during those times for 8 days and periodically clocked towards sun like a sunflower over the course of the day....this took longer as every day is not sunny, but charge losses negligible on no-sun days, only 2 mins full outdoor sun or 4mins of my fake indoor sun needed to power the watch for a day of operation.</p><p></p><p>It surely must be fully charged now and I can stop with the nonsense that a full charge indication on the watch would have saved, and can park it under my LED lamp for 4hrs each evening and hopefully have no problems the rest of long sleeve/coat season.</p><p></p><p>Wish all this scientific sounding determination was more than a SWAG, but it ain't, minus a full charge indicator on the watch.</p></blockquote><p></p>
[QUOTE="mtngunr, post: 4368000, member: 46104"] For any one or two who followed my incessant whining on making sure a 10mth old new watch of possible near empty charge was fully charged for winter under sleeves, outside of a few hours nightly under a low wattage LED bedside lamp... And the wildly varying amounts of charge time through window glass (28-90hrs) given by two manufacturer sources... One source flatly stated the low charge available thru a window was due to filtering and coatings, assumedly them using city building glass/Tokyo code glass/whatever. My windows are plain glass, single pane, unfiltered past dust on exterior or losses from reflection with sun at an angle. Found that plain glass of normal pane thickness exceeds 90% light transmission dead on, drops to 70% at a 30° angle... Assuming a worst case only 50% getting through glass, and worst case of only saying light entering was worth a damn only between 10am-2pm on a south facing window, I would be getting 2hrs equiv full outdoor sunlight per day... Conflicting maker manuals say 7hrs and 12hrs of full outdoor sunlight to fully charge a dead battery (assumedly pointed dead at sun for all that time, which is impossible while wearing).... my worst case 2hrs equiv. full sunlight per day would be six days max, and I made sure the watch was in the window on sunny days during those times for 8 days and periodically clocked towards sun like a sunflower over the course of the day....this took longer as every day is not sunny, but charge losses negligible on no-sun days, only 2 mins full outdoor sun or 4mins of my fake indoor sun needed to power the watch for a day of operation. It surely must be fully charged now and I can stop with the nonsense that a full charge indication on the watch would have saved, and can park it under my LED lamp for 4hrs each evening and hopefully have no problems the rest of long sleeve/coat season. Wish all this scientific sounding determination was more than a SWAG, but it ain't, minus a full charge indicator on the watch. [/QUOTE]
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