The Australian Centenary History Defence
This qualifies as one of my best ever computer purchases. This 9 cell battery makes the Net Book a vastly more usable tool. The IPAQ 4700 that I've been using as a reader for several years finally gave out forcing me to go to my two year old Net Book. (My wife uses a NOOK, but I'm too cheap to buy a second one). The original battery was good for 2.5 hours of reading and severely limits its usefulness. This battery, at less than $30, gives me 8 to 10 hours of reading time.
I don't object to the additional size. It's only logical that more power requires more cells. I've used it daily for a month now and have no issues whatsoever. It fits perfectly with no movement at all after closing the lock tab. It charges in less than an hour and provides all the time that is listed on the battery meter.
I still carry the old charged battery as a backup, but I doubt that it will ever be used. However I did notice this morning that the old battery might be useful when sitting in a doctors waiting room since the old battery is smaller and lighter and might be more convenient for less than 2.5 hours of use.