A30 - Need new battery

[jablon10]

I'm going on a long flight and I want a new battery so I can watch a movie (or 2?) on the way. My A30 battery only lasts about an hour right now.

Any recommendations on were/what to buy?

I know I can get an OEM battery from IBM
http://www-132.ibm.com/webapp/wcs/store ... &storeId=1

What about the other's available on the web? Will the generic batteries work as well? How long can I expect a new battery to last on a full charge, more specifically how long can I watch a DVD?

What about the ultrabay battery? How long does it last?

Lots of questions...

Thanks!

mike