runtime x discharge amps divided by desired discharge amps (ie. 600 x 20amps / 30 = 400). Good theoretical but times can vary since cell react differently to different amp rates. Also, i have been told that a +- 3% in runtime from discharge to discharge can be experienced, in part due to temperature differences.- hope this helps.
Voltage is even more estimated but typically .01.51-2v per 5amps or .03.4-5v difference between 20amp and 30amp voltages. BMcG (Axiom5b) did a nice mathmatical calculation that showed this)... Of course .03.5v is technically .04v, he,he,he.
hey steve/BMcG what's up bros? James and i might come up for practice at Venture on Saturday but nothing is set yet.
Practiced at Trackside last Friday with Juch's and Paul, had a great time and i am looking forward to the season...After a few more rounds of golf that is. LOL!!!