[Raze ST Truggy]

I have 4 zippy K packs, 2 4300mAh 2S and 2 4300mAh 3S. One of each has failed on me. The 3S that failed had 1 maybe 2 cells puff while the pack was just sitting on my dinning room table this summer. I was monitoring the voltage on a regular bassis and one day when I went to check the pack was puffed.

The 2S that failed had a dead cell from the get go. It never took a good charge on my ballance charger. Returning isn't an option becasue the shipping would be more than I have in the packs.

The other two that are still good work great. I use them in a variety of cars, rustler 2S, and 3S, the converted revo has been run on 3S (becasue I forgot my series connector), but usually 5S (2S + 3S). The packs don't get more than 105f in the heat of the summer.

I must be a glutton for punishment though becasue I have a 3S 4000mAh and 6S 4000mAh on the way that are to be run in series (when I get lutach's 10S esc), and 2 of the 4000mAh (suposed to be 25C)hard case 2S packs that they just released also on the way.

All that said though I do plan on buying two of Mikes 5S2P 5000mAh packs for my Muggy when he gets them back in stock. Sorry for the long winded reply.

-Brian