If i were you i would just play it safe and get a somthign like this to check your battereies
http://www2.towerhobbies.com/cgi-bin...&I=LXWW16&P=ML I check mine before EVREY flight also you will need some charge leads
http://www2.towerhobbies.com/cgi-bin...&I=LXL335&P=ML to go between the tester and the wire.
Steven