if you are using a Zip Stove as a "no fuel" stove,that is burning anything that comes to hand and maybe recharging the battery with a solar gizmo here is a tip.
don't think about it as a stove but a open fire.
full info at my Youtube video on the link below.
http://www.youtube.com/watch?v=tIaBRrCeaes&list=UUw_6IX2Lurj33HDAyz7BIXw&index=1