I'd run it like I would a mech, don't red line the battery all the time, the battery is like a racing engine, red line it at 200mph all the time, eventually it will blow. 0.25ohms are the lowest I run on a mech due to the batteries, to ratings determine CDR of a battery, C rating and Mah, either figure decreases, CDR decreases. Most of the time it is the Mah that decreases over time, using a battery gently, 1.5ohms or higher, low amp pull, the battery could last a year, push it to its CDR all the time, the battery can last a month to 3months due it being cooked and killing its Mah capacity, so I run between 50% to 75% total CDR with my builds, 6months down the road a 20amp battery could only be a 10amp battery by then. 70watts from 100watts, you are only running it at 70%, so safe yes, but fully safe in case of an "UHOH" short out. I have yet to hear anyone vent a Tesla 2, not to say it hasn't happened, out here in the Sun and Sand and Concrete Jungle of Phoenix the clouding scene is pretty big with a lot of youngsters getting themselves into trouble pushing the limits, about as big a scene as LA, but no incidents with the Tesla 2 reported, so from my observations a pretty stable battery pack in it.