Here Ya GO !!! Thanks, by the way for asking this question...It made me curious so I Googled the hell out of it and finally found this product from Fromeco. I knew about the Kodiak (which is a meter and switch in one package) but I didn't know about this cool little meter. I think I'm gonna get some too!!
These meter the Mah USED (not volts remaining), so its easy to tell what's left if U just reset the meter after charging.........
http://www.fromeco.org/Products/05FRCWEASD/Default.aspx (Deans in/out)
http://www.fromeco.org/Products/05FRCWEAS/Default.aspx (Futaba and JR in/out)