is 0.4A sufficient for charging?

[Thomas Gstädtner]

On Tue, Jun 23, 2009 at 07:31, ivvmm<unachievable at gmail.com> wrote:
> Hello list,
>
> going to buy a device from a local store that will convert alternating
> current from my bicycle's front hub dynamo to 5V 0.4A. Is that
> sufficient for charging my Neo?

It is.
USB is specified for 0.5 A @ 5V (^= 2.5 W)
With 0.4 A @ 5V you'll be at about 2 W which is more than enough to
run the Neo with all devices powered (display, gps, gsm, wifi) and
even enough to load it while it's running (although this might be
slower than USB).
However, you should make sure this power converter has some big
capacitors to make sure you get a constant supply - otherwise it's not
good for your battery on long term.