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Gigabeat F40 Charging question

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PCpr0gramer:

I took the USB cable for my Gigabeat and cut it in half (I'm not dumb, I have multiple,) to use as input for a battery based charger for my player.

IE: |Batteries|----usb cable----->|Player|

The only problem is that the player does not accept a charge from USB unless it is 'talking' to the computer. Is there any way to get around this besides using the 5V input up top to charge from external batteries?

Thank you for all of your help.

Mad Cow:
My Gigabeat charges fine with an AC USB charger, which is electrically the same as a USB cable attached to batteries. Remember that the gigabeat has to be turned on to charge through USB. Why don't you want to use the 5V plug? It's so much more practical.

PCpr0gramer:

The AC adapter does work, and I could use it to charge from batteries, but I have more than one usb cord, and only one AC adapter cable so I don't want to go and cut it up. It does charge when hooked up to the computer through usb, just not when its hooked up to batteries through usb. Thank you for your input though.

markun:

--- Quote from: Mad Cow on November 08, 2007, 09:29:31 PM ---Remember that the gigabeat has to be turned on to charge through USB.

--- End quote ---

This is not true. The Gigabeat charges over USB, even if turned off. You just don't see it on the display. Just try it: remember the battery percentage and turn the player off, leave the USB cable connected for a while and turn it back on.

We could display a charging screen if we ever flash our own bootloader, but that would also slow down the charging of course.

PCpr0gramer:
Thanks for the info. One last thing before I try it out, I know it takes 5V in through USB. At how many volts do I run the risk of doing damage?

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