Originally Posted by nnick
I don't think reason IB are so fragile is their matching process! 2-5 cycles cells are getting from a matcher and then public gets them. After all when we run the cell discharge rate is way more than 30 or even 40A!!
Racing stock or 19T sedan is the easiest time in a cells life.
Cycling cells is harder on them (even at 30A) than running them in a car unless you are a world class open mod racer.
Also, IB4200WC cells are the most fragile cells since the Sanyo 1700SCE and Panasonic P-170.
All of the following will kill a IB4200:
1. Getting them over 150deg F (this happens all the time in 19T and Mod Sedan).
2. Over peaking....they get hottest a minute or two AFTER peaking.
3. Letting them sit on a shelf for 2 months without running them.
4. Running them them once in a mod sedan (if you are fast you will lose one cell per 6 cell pack every single run).