I'm more worried about screen issues than the battery. The Nexus 4 I returned had a horrible screen.
When viewed from straight on it was yellow, but when turning it away from my face it looked normal. Also the backlighting was really bad. I saw a lot of complaints about bad backlighting. I hope they've fixed it with the new LCD. The G2s I've looked at didn't have any issues that I could see, but sometimes having something at home gives you more time to evaluate quality than just a few minutes in the store. I'm hopeful, though, that the Nexus 5 will be better.
https://forums.macrumors.com/posts/17203681/
When viewed from straight on it was yellow, but when turning it away from my face it looked normal. Also the backlighting was really bad. I saw a lot of complaints about bad backlighting. I hope they've fixed it with the new LCD. The G2s I've looked at didn't have any issues that I could see, but sometimes having something at home gives you more time to evaluate quality than just a few minutes in the store. I'm hopeful, though, that the Nexus 5 will be better.
https://forums.macrumors.com/posts/17203681/