Has anybody tried this external battery? Seems to get pretty good reviews and not as pricey as the Tekkeon. Downside is that this won't charge laptops. (I have a Tekkeon and find it to be a monstrosity...albeit a FLEXIBLE monstrosity...due to all the different pieces/parts).
http://http://www.newtrent.com/IMP880P-IPhone-External-battery-p/imp880.htm
http://www.amazon.com/New-Trent-ultra-pack-IMP880-Blackberry/dp/B002YFDRHW/ref=pd_rhf_p_t_3
http://http://www.newtrent.com/IMP880P-IPhone-External-battery-p/imp880.htm
http://www.amazon.com/New-Trent-ultra-pack-IMP880-Blackberry/dp/B002YFDRHW/ref=pd_rhf_p_t_3