I ended up getting these: http://www.amazon.com/gp/aw/d/B003C1HH32/ref=ya_aw_oh_pit I was a little scared of the very cheap Chinese charger, plus I wanted a rapid charger anyway.

http://www.amazon.com/gp/aw/d/B004IEIK9W/ref=ya_aw_oh_pit 5000 mAh should give me a nice run, though I did see to give it a cool off period after 15 minutes.