Upgrade to 1600 mAh battery?

Hiya, I have got my heart set on a curve 9360, but I have read on the Internet and have heard from friends that this phone doesn't have a fantastic battery life, so I was wondering if I could simply pop one of these in instead of the original battery?

http://www.amazon.co.uk/Replacement-...bUvbUpU8251029

What I would like to know is, what kind of improvement would this make over the stock and standard battery? And would it void any kind of warranty? The help would very much be appreciated by this blackberry newbie!

It looks interesting, but keep in mind sometimes those require extra large doors, also your experience WILL vary. Some companies are better than others, Seidio and Mugen Power are two good ones. :)

this does not even look like em1 battery.

hmm this is interestin... but like "2c" said... that doesn't even look like it will fit in the 9360, cuz if they do hav
an improved battery for the 9360 I would love to hav it

it really doesn't look like E-M1 battery..
There are some 1600 mAh batteries that comes with special back cover (as this one) because of it's bigger size.
But if the battery isn't quality made, you won't get better performance... usually even worse than original ones, despite bigger capacity.
I wouldn't buy it.