neonkoala

Is there any way of charging my axim using solar power for on the move and cos its free that is the x3

cheers

doogald

I've never tried it myself, but I think that the iSun may be able to.

uzziah0

I've seen rechargers for a variety of electronic devices (you just need to find the right power output and connector), but they are usually expensive enough that they would not be considered free for a very long time.

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craig139

Another one is the Suncatcher Sport from Mobileplanet for $99. Follow this link:

http://www.mobileplanet.com/product....23&listin g=1

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neonkoala

Thanks for those i think ill try and get one of ebay!

Chrissss

The problem I see with these chargers is very low amperage output. The Dell charger is more than 1000 milliamps (1+ amps), where these solar chargers are only 250 - 300 m/amp.

If it would charge at all, it would be very, very slow. It would be more like a trickle charger...which isn't recommended for Li Ion batteries.

Chris...

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uzziah0

Actually, the charger/sync cables are through USB at 5V and something like 300 amps, which can actually drain the battery if the battery is low enough (like below 70%).
So, this solar charger working at 300 amps could drain an Axim.

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doogald

Quote:

Originally posted by Chrissss If it would charge at all, it would be very, very slow. It would be more like a trickle charger...which isn't recommended for Li Ion batteries.

I'm not sure that I agree with this statement. All that I have read about Li-Ion batteries is that it is better to keep them at high charge levels and trickle charge them often than it is to allow them to deep discharge and apply a high charge circuit to them.

Obviously there would be a problem when the charge is low, as the previous poster notes, as it will deep discharge the battery rather than charge it.

Chrissss

Following the links to Li Ion battery info provided in many posts by MrKlaatu, you'll find they don't recommend 'trickle-charging' these batteries.

I would guess this is because the internal circuitry is there to protect the battery from overcharging. The circuitry stops the charging process based on a finishing current level as opposed to a voltage level.

Perhaps the trickle charge current is below the threshold controlled by the battery circuitry and can then cause overcharging?

Chris...

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tgreenstein

Quote:

Originally posted by uzziah0 Actually, the charger/sync cables are through USB at 5V and something like 300 amps, which can actually drain the battery if the battery is low enough (like below 70%). So, this solar charger working at 300 amps could drain an Axim.

I think you meant 300ma (milliamps; 300ma = three-tenths of an ampere), not 300 amps.

Just for reference, the Dell-supplied AC adapter/charger is rated at 2410ma (2.41 amps) at 5.4v.

But the point running through this thread is important: most solar-powered charging systems on the consumer market generate relatively low levels of current, probably not enough to recharge the Axim's battery if it's discharged much below 70-80%. I suppose in principle you could use one of these systems to charge a high-capacity 6v or 12v battery (or maybe a battery pack of D cells) and then somehow use the battery to charge the Axim at a higher rate of current...but that seems pretty clunky to me.

P.S. Just noticed that you were asking about the X3...I don't know exactly what the charging requirements are, but they probably aren't that much different than the X5.

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uzziah0

Quote:

Originally posted by tgreenstein I think you meant 300ma (milliamps; 300ma = three-tenths of an ampere), not 300 amps.

Opps.
I think 300 amps would blow the Axim and just about everything in the area.
Thanks for the correction.

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tgreenstein

Actually, I don't think having a higher current (amperage) capacity would burn out your Axim (or any other electronic device that I can think of). If this were true, then every light bulb in your car would burn out every time you turned them on -- because the car battery is capable of supplying 12vdc at very high amperage levels. It's the voltage level that needs to be kept in check -- try feeding 110v to a 12v auto bulb and watch what happens.

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uzziah0

When I was a kid I tried feeding 110v to a 12v transistor radio. I wished I had hooked up my junkier radio, since it fried it.

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neonkoala

i think ill stick to AC then and avoid risks although i saw someting that gives out enough for a cigarette lighter so u can use car adqapters for your appliance