I am going to try to answer some of the many questions asked here.
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Originally Posted by Ceril
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This is a really confusing thread so please forgive me.
if your power source is the car - a 12v battery then the source should be adequate for the charging
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Well yes and no. Yes the original power source in the car 12v is more then enough to supply the axim (a cig lighter can normally supply 10amps). The problem is the converter that you plug into that outlet some of the just can not handle the axim when charging or when it has a high current drain.
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Originally Posted by Ceril
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the wall (i live outside USA) is 240v 0.15A so that source should be adequate as well.
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This is a lot like the first question here. Again the wall outlet can handle the power in your case .15A at 240v is plenty of power except your looking at the wrong side here thats input power the important part is what the device changing the power from 240v to 5v can supply.
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Originally Posted by Ceril
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so when we are talking about the type of charger - is it the cable itself that is the source for problems? Or is it the connection from the cable to the handheld - not made correctly?
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Its not the cable itself its more what the cable plugs into. Now on the whole is the connection made correctly you could argue that either way. I think its correct to a point but only when used with devices that are designed for the power requirements needed.
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Originally Posted by Ceril
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or the "head" connector from the power source to the cable?
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I assume you are talking about what the other end of the cable is plugging into. AKA the power source for the cable. Then yes that is the source of the problems.
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Originally Posted by Ceril
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An example - I have a cord for a different palm which has a handheld connector, USB (for charging and synch) but the heads off wall supply output of 5.0v Vdc, 1A, 5.0W (max) and the car charger head 5.4Vdc, 850mA - both of which should be fine for the power, right? So I would expect that either the cable cannot handle the power (sounds odd since it doesn't take a lot) or the connector to the handheld, which was already mentioned.
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The first one which is 5v and can supply 1A should be fine for most uses. The 1A (amps) is equal to 1000mA (milliamps). If you use the original battery you need at most around 650mA to charge the handheld if the battery is discharged more then around 33% (when the battery screen shows 67%) that leaves you with about 350mA to run the handheld which if you don't have power intensive things running or have both the screen brightness up and the processer at 624 it should be fine. If you use the extended battery I would not use the axim while charging with this power source.
The second power supply 5.4v with a current of 850mA is a little more of a problem. As above the standard battery can need as much as 650mA to just charge which does not leave the system much current to run on and could cause a problem if trying to charge and use the system at once. With the extended battery I would not even try this charger as you can need more then it can supply just to charge the battery.
On a final note most of this stuff is over built and can really supply more then it says on the package. But not always (computer power supplys are a great example of when not to assume it can supply what it says it can)
I hope this is some help. I am an EE and deal with electricty for a living while most of you guys just expect to plug stuff in and have it work. I have tried to not put anything too technical in. Thinking a new thread thats a FAQ might be in order.