new battery pack?

[Danjr1]

im running 4 12v argos drill motors. how long roughly will a 12v 3800mAh pack last for?

[rob]

im running 4 12v argos drill motors. how long roughly will a 12v 3800mAh pack last for?

try this site.
http://www.rtideas.com/battcalc/
You'll need the Flash plug-in to use it.

or google for battery life calculators.

[Bodge Job]

thats usefull, it shows that if my robot draws 150amps it can run for 3 minuits (but sadly my ESC's can't svive that)

[daliad100]

Have you tried Team Tentacle's torque and battery calculator? I'm not sure if they have your precise batteries and drills in there but it should give a good indication of how long things will last.