Same way as others chargers - you know the 4 cell AA holder than comes with an rtr to power the onboard electronics - you can use one of those or they make a 8 cell holder as well. From there, its just a connection problem - these holders are a jst type connection and you need an adapter. Heres a 4 cell holder -

http://www3.towerhobbies.com/cgi-bin...?&I=LXLX82&P=7

And the 8 cell -

http://www3.towerhobbies.com/cgi-bin...?&I=LXN737&P=7

1amp is max charge advised rate for AAs, you can go higher but life suffers. I don'tthink this is the bestway to charge them,but its only way I've seen using a hobby charger.