USB Power Adapter

[clintbradford]

Not in my Kobo - but in a couple other small electronics items I have: They refuse to charge properly with "other" USB charging systems. Like my Verizon MiFI - Use a car cord USB cable charger, and it flat out refuses to charge. But use its included 300mAH AC-to-USB cord, and all is well. I was under the impression that the Li-Ion pack's built-in regulation circuitry was "kicking in" and not recognizing the higher current system.

So this is incorrect thinking?

[zoran]

Originally Posted by clintbradford

Not in my Kobo - but in a couple other small electronics items I have: They refuse to charge properly with "other" USB charging systems. Like my Verizon MiFI - Use a car cord USB cable charger, and it flat out refuses to charge. But use its included 300mAH AC-to-USB cord, and all is well. I was under the impression that the Li-Ion pack's built-in regulation circuitry was "kicking in" and not recognizing the higher current system.

So this is incorrect thinking?

I'm sure that mobos do strange things for usb adapters. Some of them
cannot charge the device, except on usb on the back of the case. Those
on the front simply fail. Try out usb post on the back and report if
works.

[3d0g]

Originally Posted by clintbradford

Not in my Kobo - but in a couple other small electronics items I have: They refuse to charge properly with "other" USB charging systems. Like my Verizon MiFI - Use a car cord USB cable charger, and it flat out refuses to charge. But use its included 300mAH AC-to-USB cord, and all is well. I was under the impression that the Li-Ion pack's built-in regulation circuitry was "kicking in" and not recognizing the higher current system.

So this is incorrect thinking?

Yup. Hard to say, but I suspect the car USB charger is outputting incorrect voltage (some of them are really bad), or it can't deliver the required 300mA.

[zoran]

Originally Posted by 3d0g

Yup. Hard to say, but I suspect the car USB charger is outputting incorrect voltage (some of them are really bad), or it can't deliver the required 300mA.

Or it delivers it, but not stable. If has ups and downs, here comes
the problem.

[clintbradford]

Awesome info - thanks!

[pholy]

but in a couple other small electronics items I have: They refuse to charge properly with "other" USB charging systems.

Ahh, yes. The Sony Readers are like that. They will charge if plugged in to a computer's USB port, but not in a USB charger. How, why? I don't know, but is a real PITA. I ended up buying a PlayStationPortable charger just for the PRS505.

But barring stupid manufacturer's games, any well-regulated (name-brand) charger with enough output will do the job.

[KjellM]

Originally Posted by clintbradford

Not in my Kobo - but in a couple other small electronics items I have: They refuse to charge properly with "other" USB charging systems.

The problem is that some electronics want a response over the USB digital path to set their charge current level - the USB controller in a computer can tell a unit how much current is available, or the unit can tell the computer how much current it needs. There are some AC-to-USB chargers that have a chip in them that will do the basic dialog with the unit so it will charge.

[zoran]

Originally Posted by KjellM

The problem is that some electronics want a response over the USB digital path to set their charge current level - the USB controller in a computer can tell a unit how much current is available, or the unit can tell the computer how much current it needs. There are some AC-to-USB chargers that have a chip in them that will do the basic dialog with the unit so it will charge.

How this one looks regarding that:

http://www.elive.co.nz/logitech-939-...bhub-p2050.php

[SageTracey]

I just use the USB charger we bought for our houseful of iPod/iPhone/iPads and it works fine for my Kobo. Actually, it works better than fine....my Kobo often freezes after I connect and disconnect properly from my PC, a problem that NEVER occurs when I use the USB charger.

Now...if there was just a way to download my books via the electrical circuits.....

[goinveg]

I bought the Gizmo Dorks set through Amazon. The wall-USB charger works well but the car-USB charger quits after about 30 seconds. Thry are both labeled 1000mAh and both have red light to show functioning.

[PeterT]

Found this today at the Source --> 4 PORT USB TRAVEL ADAPTER
http://www.thesource.ca/estore/produ...roduct=2738616

On sale for $15