Unfortunately, those are NOT AA size cells. 18650 cells are much larger. See <http://happypics.zapto.org/displayimage.php?pid=3026> 73 de W4CWZ On 7/13/2014 5:58 PM, KB9WMJ at wi.rr.com wrote: > Use a better AA battery (3.7V 4.9AH Li-ion): > http://www.ebay.com/itm/181411959514 > >