[Nexus One General] disgustip8ted:
I'm not certain there is a "bad battery life" so to speak, rather than the part number i'd be more curious as to what is eating up your battery life. check under settings>applications>running services and see whats going on under the hood

with a full charge i have 4187mV charge, when it wants to shut off its around 3000mV or so. this mV reading is from the "battery left" widget. I highly recommend this widget as it gives you a pretty good idea as to what is using the battery up.

i usually unplug it at around 730am and lasts until about 10 or 11 pm, depending on what im doing that day. to give you an idea of my usage, i check a few rss feeds and check email and play some mp3s from the sdcard on the way to work, then sometimes play in the market a few minutes and do some casual web browsing while at work to break the monotony, check personal email some times , listen to some sd card mp3s and check some tasks in astrid. I have the email sync about 15min, background data and contacts sync on auto, work email on sync about 15 minutes, twitter sync every 4 hours, newsrob sync every two hours, gps on wireless on, brightness auto adjust or 75-100%.

Here are some things I notice that obliterate my battery

streaming music with last.fm - this chews through the battery a bit, I would say it will last about 6 or 7 hours constant streaming over 3g/wireless.

navigation app - using the gps with maps eats the battery up, its about dead after a 1 1/2 to 2 hour trip with no charge, couple that with streaming music and you basically have to have it plugged in if you plan on using it at your destination

no signal - while im at work ive got some pretty poor reception, I've started putting the thing into airplane mode then manually turning the wireless back on, this gives you some connectivity with google voice voicemail and google voice sms while not actually having the 3g radio constantly working to find a signal, the 3g radio really takes a lot of the battery imo. I used the tmo band N1 and put a check in the force 2g connection checkbox(since i was on att) and the thing would last all day plus most of the night, when i got the att band N1 i did notice quite a bit of difference in the battery life, the 3g used up a noticeable amount more battery.

screen brightness - this one i dont have too tough of an issue with, ive used the 100% brightness for a bit and didnt notice too much of a difference compared to the auto adjust.

IM applications - i used to have meebo constantly running until i noticed it wouldnt stay connected very well, then i found that if you lost connection it would try to reconnect for 2 minutes, if not connection after that it would just sit there saying no connecction and still eat the battery, since not starting it up i do notice better battery life, i keep it on the phone for when i do need it but dont have it constantly running any more.

web browser - Ive noticed a couple times where I had been using buzz or some other website and found my battery die fairly quickly, it ended up that i had a couple different tabs open in the browser, namely buzz and some other forum page i frequent. it seems these tabs were continually trying to refresh or something and just sipping off of the battery. what i do now when closing the browser is go into the windows menu and close each tab before exiting out of the browser by tapping the back button at the bottom

rogue applications - those crazy things....wanting to force close and crash and take your battery with it trying to process whatever endless loop they are stuck in. not to single out any specific app, things happen, but Ive had the last.fm app sort of crash while switching from wireless to 3g when leaving the house one time and it just wouldnt die, i had to actually reboot the phone, I could tell it was just draining on the battery since the phone was actually getting warm, as it does when its working hard or streaming audio.

tl;dr: I dont mind paying attention to what is actually running on my phone and charging it while im sitting at the office listening to music or always having it plugged in while using the navigation app....it is primarily a phone after all.

to answer your question, the att band N1 i have currently is a B and the tmo banding N1 i was using on att was an F, and in my opinion, they both have fine battery life depending on what I was doing with it along the course of the day.