The person who said the 2450 wasnt "accurate" might also just have gotten a bad one. You never know especially with the junk they send out of china. Ill tell you a quick story.
Theres a really good performance part for my car, its really simple and gives good performance. Now the one from a "proper" retailer is almost $300. Check out Ebay and you can get a China knockoff for like $40. I have ordered 4 of these over the course of a couple years, and all of them were perfect except for one, it was missing some markings that made it very difficult to change a particular setting on my car. Shit like that just happens. That guy might have just gotten a bad one. I say go for the 2450. Try two even. Even buying two, if ONE turns out to be close to 2450, thats STILL half or less than what you would pay for one of the factory batteries from LG (and from what I have read, there is STILL a VERY good chance youll get a bad one from them that overheats or doesnt last etc), and EVEN if they BOTH only have somewhere near 1900, thats STILL less than half of factory for better life (30% better which is not too shabby for keeping stock size). Like my car part, even buying 4 of them (which were not all for the same car mind you, just the replacement for the unmarked one), Im STILL $100 less than what I would have paid for a "proper" one. IF you want to wait, Im getting a 1900 in and Im probably going to be ordering a 2450 in sometime soon, so Im going to be reviewing them in the near future.