if the Zaurus can be charged through the USB port, why didn\'t sharp make their cable into an USB link+charger combo
OK, I get it. But got a simple answer.
Save having to explain it all to consumers. Far too confusing
Please use the charging adaptor supplied.
Unless you are using the Sync cable since that will also charge your unit.
You may also use the sync cable to charge your unit from your or another PC even if you are not syncing with it.
But the PC must be switched on to charge your unit.
However, you may want to use the adaptor supplied anyway, since it will charge faster than the sync. cable.
But what if I want to sync. and charge quickly at the same time ?
etc. etc.
Regarding battery charger. Your calcs are optimistic.
2400 mAh battery at 1.25 volts each so 5 volts at 2400 mAh.
No idea abot efficencies etc. Not a battery expert, you can probably get a PhD in these things. Perhaps someone else can shed light on this. 2400 maybe output.
Plus I would guess you never actually use all 1700mAh of your battery. So you would only be calculating topups from whatever capacity is actually used before battery is shut off.
My guestimate 1.5 to 2 good additional charges.
Rapidly loosing will to live, will stop now.