[Gta04-owner] Charging battery from USB

Benjamin Kiessling mittagessen at l.unchti.me
Wed Nov 9 18:22:35 CET 2011


Hi,

> The GTA04 also has a problem with USB charging if the battery is
> drained. A low voltage battery is being trickle charged with approx.
> 70 mA. After the power-on voltage (ca. 3.2V) is reached, the CPU switches on
> but then draws approx. 100-400 mA. This of course discharges the
> battery faster than it is being recharged. Depending on some chemical
> effects in the battery and operational thresholds, it may still be
> sufficient to boot the processor far enough that the software enables
> a higher charging current (e.g. 500 mA).

Trickle charging works. After around 15min it just booted up and
everything works now. Thanks for the tip.

Regards,
Ben


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