Do not charge (battery) under airtight conditions

[chex]

mine is whopping 18 Ah, 13#. i think that size is typically used by wheelchairs. i'm running a Hbird 798 ci si. it is 5" color with gps.

whoa! that's a big one.

I have the same FF, but DI instead of SI. It draws 650mA. According to http://easycalculation.com/physics/c...ttery-life.php, you should get almost 20 hours with your monster battery.