On February 24, 2012 at 15:15, FearTheVoices said...
The stock one had a huge belly on both sides actually when i took it out.
That's common, be sure to check the new one once a month or so. The battery pack could eventually leak battery acid...not good. We've replaced several for clients that were on the verge of leaking and what you had there was the tell tale sign of that about to occur. Luckily the battery usually fails to the level of not being useable, prior to leaking, so that throws up a flag and initiates a service call by the client.