Well, according to LuxLuthor's testing, at 19.2 volts, the 64458 will draw between 10.1 and 10.3 amps.
http://www.candlepowerforums.com/vb/showpost.php?p=2218688
The load graph at CheapBatteryPacks shows that, with a 10 amp draw, the Elite 1700 AAs will hold over 1.2 volts for over half their...