I would imagine that you would get slightly less than double the run time in an exact like for like test.
I would also imagine (can\'t test it as I have never seen an sl5600, nor I am I likely too as they don\'t sell them in the UK) that they draw similar power from the battery.
The battery monitor is very poor at detecting voltage levels and (like the fuel guage on my car) report full for a long time, than drop to 75% briefly, then say \"Please recharge the battery\" very shortly after.
Basically if you get 1 hours use out of your battery you would expect it to show 9(something)% after about 10mins, not 100% as both my Zauri show after 20mins usage.
My 5500 has a 960mah battery my c760 has a 1700 mah and I believe the 5600 has the same battery as my c760. I get slighlty less than double the usage on my c760.
It also depends on how much power your cf wireless card uses as they are not all the same.
A battery extender using 4 1800mah 1.2v AA ni-mh batteries can be built very easily for £2 + about £5 for the batteries. This gives me approx 2 full re-charges on my 5500 or allows me to run it nearly all day continually (without wi-fi), you can also build them using \'C\' and \'D\' cells (bigger, heavier and more expensive! but give you *many* re-charges).
You can also build one using 8 AA ni-mh batteries 4*4 in parralel, or use an RC-car battery and a regulator, or buy a custom 5v battery pack designed for a camcorder, or use a car-charger, or use a usb charger from a pc, or use a solar panel, or use one of the funky phone one time recharger packs (expensive), or ...... The possibilities are enless if you have the imagination and either a basic understanding of electronics or the willingness to learn.
Battery power is only an issue if you can\'t be botherd to explore the many other sources, or just want it to work without any fiddling/extra cost/extra wires etc.
They are both very good machines, you have to prioritise the pro\'s/cons yourslef based on you and your expected usage from the device.
If money was no object, then you will want to upgrade very quickly, but I suspect if that was the case you would not be asking this question in the first place.
Also, most of the \"seasoned hackers\" who can afford it have allready upgraded to either the sl6000, or the cxx0 series (at a guess the cxx0 wins at the moment, but this may change as the sl6000 is still very new).
The cxx0 series came out at about the same time as the 5600 and was much harder to obtain for the us/europeans but somehow got a working oz install before the 5600 did, and the pdaxrom. Also the 5500 still has new releases of kernel/roms released fairly regularly from the community.
In terms of already developed apps, the 5500 had the bigger user base because the 5600 was not percieved as a big enough improvement to warrant an upgrade ( and was only released in America, where as the 5500 was almost worldwide).
Having said that the vast majority of software will run on the 5600, but low level stuff like rom upgrades won\'t
Your wish list will work fine on either model, but your wish list may change somewhat once you get more familiar with the device.
I would not have bothererd typing all this if you had just wanted a pda, but I get the impression that you will want more out of it as your knowledge and experience grows.
They are both good machines, you have to prioritise what you *most* want out of it before you make that decision, then expect it to change once you own one :wink:
From What I gather they are both now largely discontinued and only available from selected places.
I have probably confused you even more now, but if you have anymore questions, then ask away.
Peter
