Eugene, you can have both (AA + micro USB): http://www.ebay.com/itm/271612539290 (I saw 1500mAh as well). There is a quirk with these though, you canot use a regular AA charger, these have a special charging ring around the positive tip, which accepts a special 5V charger.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.