bought them to run parallel in my 1/8 buggy, but one of them had a dud cell, took the cell out, and rewired it as a 3s batt...
the 4s has 4 runs on it, alwase stayed ballanced
the 3s has 8ish runs on.
http://www.hobbycity.com/hobbycity/s...idProduct=9264
$50 shipped for BOTH!!
