current focus

Werner Almesberger werner at
Wed Jul 9 19:14:02 CEST 2008

I wrote:
>     [...] while the GTA02 battery wants to have a few millijoule
>     in its belly before it's willing to talk to the world again.

BTW, here's what this looks like:

This graph shows the voltage over the battery terminals of a GTA02
battery. The battery starts in cut-off. A power supply delivers 3.5V
through a 1kOhm resistor for 58s. Then it switches off for 2s and we
see the voltage drop. This repeats until the battery snaps out of
cut-off and begins the normal charging process.

- Werner

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