li-po in hard case

[MetalMan]

I don't think we should be considering runtimes when trying to figure out the heat of a Lipo battery. My Rustler can get very good runtimes out of a 3300mah Lipo battery (like 15-20mins), yet somehow the battery comes out warm. This is due to the large amp bursts, and these are what need to be focused on (not average draw). For example, I was just running my Rustler with the Eagle Tree Micro Recorder hooked up doing some back-and-forth runs with normal gearing. My 3300mah battery is only rated at 33amps continuous, yet it was allowing spikes to 60+ amps. I hadn't been pulling too many amps during this 5min. run, since the GPS was on it, but not strapped in. As soon as I removed the GPS and started doing some wheelies and quick pulls of the throttle, the battery actually started to heat up. But even still, the average draw was most likely only ~15amps.

I realize that there shouldn't be a problem with these batteries, but you have to figure the worst case scenario. My personal opinion is that temperature is far more important that small dents (from rocks), as Lipo cells can take them (and the shrink wrap would take most of the force of the rock). For this reason, as well as the extremely high (IMO) price, this pack will never be sitting in any vehicle of mine.