I doubt they will bring in N5 already since got rumors on N6 releasing this year

I don't mind if by the time N6 got released in Google Play Countries, LG M'sia decide to launch N5 locally at a retail price of RM999

If that's the case, it's still worth getting

I managed to get about 2.5 hours SOT with 1 day and 18 hours on standby when I was on stock kernel. Now that I've flashed ElementalX kernel, am able to squeeze more SOT 

SOT had to coupled with total battery life. 2.5hours plus 1 day standby is good enough.

I'm gonna be direct. It is not as good as the other android flagships at the moment which has at least 2800mah battery.

It depends on how you use the phone, Sometimes i get 1 day plus 4 hours sot, sometimes i get 3 hours sot.

Below are some of my previous times:

1d5h standby  3h31m sot 20% left
1d4h standby  3h5m sot 18% left
1d17h standby  2h48m sot 17% left
1d12h standby  3h28m sot 16% left
23h standby  2h28m sot 13%
1d11h standby  3h5m sot 6%
1d standby  4h19m 5%
22h standby  4h37m sot 0%
1d22h standby  4h10m sot 0%

All are different charges. As you can see, sometimes it is not bad with 4h sot, sometimes is just quite bad but it is good enough for me as it can tahan 1 day.

If battery life is your main concern, better go with note 3, lg g2 or maybe xperia z2 and those others which have a bigger battery.

I think it's better that u buy other phone instead of N5 which have a bigger capacity battery

Got my Nexus 5 from Direct-D this evening.
Going to stay in stock for few days 1st.

Is the batch no really important? What changed??

Not necessarily, I have 401K (2014, January batch) Rev 11 and it still inherit some of the issues.