It works ok, but there is NO extra time and the battery is much thicker. Just a hazard of aftermarket products.
I would skip this battery. It is just not any better than the small one that comes with the jetpack.
Date Added: 06/24/2012 by Steven D. (CHICAGO, IL)
3Gstore Comments: You should probably call our tech support department to make sure all is OK - as everyone that uses this battery and the sister version (that runs the 4510L) pretty much gives it the highest reviews. During our testing, it does indeed provide over 3X the battery life as the standard one.
*** UPDATE ****
You should read this update: http://www.evdoinfo.com/content/view/4185/64/
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