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Diad IV
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<blockquote data-quote="iloadthetruck" data-source="post: 92387" data-attributes="member: 885"><p>Actually, scratch_king, charging Li-ion batteries is a very sensitive process... too much heat and they could explode, or lose their charge capacity too quickly. About ten years ago, there were a lot of problems with newer laptop computers (Apple in particular), where batteries were catching on fire while charging! Li-ions are very sensitive to both ends of extreme temperatures... in fact, they are sensitive, period. Perhaps it would have been better to go with older battery technologies for the D4... who knows how long the DIAD III models were in use? I'm guessing that the D4 may only last half that amount of time.</p><p></p><p>Drivers, on the the other hand, don't catch on fire in hot weather... they just sweat.</p><p></p><p>Surviv'n: Message coverage with the D4 will vary. It really depends on the wireless provider. The D4 essentially is it's own cell phone, so it is programmed for the preferred carrier for your center. If you happen to work mostly in an area that isn't covered by that carrier, you won't get good coverage. This wasn't a problem with the DIAD III because the DVA ran over the old (now deteriorating) analog cellular systems, which weren't very picky. Now that interface is built into the D4 and is digital (CDMA, IIRC) like a modern cell phone, and, just like today's phones, one carrier will have great digital coverage while the other is lagging behind.</p></blockquote><p></p>
[QUOTE="iloadthetruck, post: 92387, member: 885"] Actually, scratch_king, charging Li-ion batteries is a very sensitive process... too much heat and they could explode, or lose their charge capacity too quickly. About ten years ago, there were a lot of problems with newer laptop computers (Apple in particular), where batteries were catching on fire while charging! Li-ions are very sensitive to both ends of extreme temperatures... in fact, they are sensitive, period. Perhaps it would have been better to go with older battery technologies for the D4... who knows how long the DIAD III models were in use? I'm guessing that the D4 may only last half that amount of time. Drivers, on the the other hand, don't catch on fire in hot weather... they just sweat. Surviv'n: Message coverage with the D4 will vary. It really depends on the wireless provider. The D4 essentially is it's own cell phone, so it is programmed for the preferred carrier for your center. If you happen to work mostly in an area that isn't covered by that carrier, you won't get good coverage. This wasn't a problem with the DIAD III because the DVA ran over the old (now deteriorating) analog cellular systems, which weren't very picky. Now that interface is built into the D4 and is digital (CDMA, IIRC) like a modern cell phone, and, just like today's phones, one carrier will have great digital coverage while the other is lagging behind. [/QUOTE]
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