Ok so I got the Reo Grande and i understand there are some battery options. Im currently using the AW IMR 18650 but my first ? Is my batt is 1600mah can I use a 2900mah does it last longer? What other batt options are something about 2 smaller 1's to do 6v and a 5v nimh? Tried looking for the answer myself but always get side track Thanks in advance