dude to be honest like what has been posted before....this thing eats battery its just tha physics of it....i have that mugen 1500 battery...it helped a lil, but just keep a car charger and a usb cord handy...thats all i can say
or go get something like this:
http://www.8starshop.com/en/usb-cell...n¤cy=USD
or
http://shopkami.com/index.php?option...category_id=63
i saw a co-worker of mine using something similar while he was walking outside...could be nice for emergencies