amp draw w/ 6-7XL

[MetalMan]

There are way too many factors for us to make any sort of conclusions here, partially including your driving style, the capabilities of your batteries, terrain/traction, gearing, etc.

In this situation continuous amp draw has no meaning - if you were to look at a graph of your Revo's current draw you would see a bunch of spikes. It sounds like what you're interested in is average amp draw. For vehicles of that size the average amp draw typically is in the range of 15-25amps. This number means nothing in terms of what batteries to choose...

Generally many will recommend a battery which is rated to supply 100amps continuously. On the same note it will also be recommended that you use a battery made by a reputable manufacturer, so that the battery can be expected to live up to its ratings.

Just FYI, depending on the battery, motor, ESC, gearing, etc., you can expect current spikes upwards of 150amps.