Just bought a couple of zippy compact 8s 25c 5800 mah batteries and have used them both on my e mtn board. http://www.hobbyking.com/hobbyking/store/__44094__ZIPPY_Compact_5800mAh_8S_25C_Lipo_Pack_EU_Warehouse_.html
I've balanced charged these batteries a couple of times this week and once was...