@alvarogr91 From what I understand this model has had battery issues even with stock android on it. I had the BQ aquaris (Ubuntu edition) and that phone's battery did last around 24 hours even with light use. However it's pretty much impossible to get one of those these days. I was looking for a phone that was simple enough to hack, so I could install Ubuntu on it, and it looked like the Nexus5 was a Favorite of developers, so I opted to get that model even though the specs are not really all that great. I go it, and found out I can't even install an sd card in it.
I hope they make more of the Meizu Pro5(Ubuntu edition) phones. That's a phone with some serious specs, but when I tried to buy it, it seemed like Chinese people don't like to take American money. The phone was/is sold out.
I got a little side tracked, the point being that I don't think we'll see a phone with a Custom ROM in it that has at least 24 hours of battery life, until we can put it on better phones, but most of the ones with specs like that are seriously locked down, and not that easy to hack.