[schettj]

Depending on what's powered up, its possible to use more power then the charger supplies.

I think all radios on + active data I/O + cpu grinding away + torch mode backlight (ie, full bright) will draw quite a bit more then 1000ma.

A normal load should not, but might draw more then half that so you can still get drain if you're only getting 500ma out of the charger.