remember if you don't wanna pi$$ball about with adapters you can get this:
http://www.hobbyking.co.uk/hobbyking/store/uh_viewItem.asp?idProduct=44687
now that is still dirt cheap and does go in my gc16 30th - tested it
but UK warehouse don't do airsoft batteries for some reason ???
so make sure you click on european warehouse and wait 5 minutes......
eventually a little box may pop up and offer them at a small discount 5 to 10% max - it varies on each battery
buying from Europe/Netherlands will be faster - by end of week rather than 2 or 3 weeks from International Hong Kong
shipping might be a little more than buying from UK but cheaper than Hong Kong and waiting....
also there seems to be no real limits on postage tariff rate - I filled a basket with 4kg's of stuff
and was same price it seemed as just buying a couple of bits from Europe ???
(i didn't purchase a ton of batteries but was being f*cking nosey)
anyway - you got some options to think about
anybody else thinking of buying those cheap nunchuck batteries.....
THEY ARE TOO LONG TO FIT INTO CRANE STOCKS !!!!
but they do fit in longer gc16 handguards up front