There's a different model extended battery for the GSM model -- make sure you get the right one.

I've had my toro GNex for about 14 months. Stock battery for about 2 weeks, then the 2100 mah OEM extended battery for close to a year. Love the phone, but I was like a vampire, always looking for a snack -- in my case, looking for a place to plug in my GNex. I finally got the Hyperion 3500 mah battery for $20 off Amazon, and it's been fantastic. I'm running JBSourcery 4.5.6 (Android 4.2.2), and have the phone either set to Auto brightness or about 70% when not on Auto. I leave Wi-Fi and BT on all day now. Location Services and GPS are always enabled -- never turn them off. I'm getting push notifications from GMail and G+, have Chrome and Chrome beta syncing with my PC Chrome install, and have active synced accounts for Dropbox, Box, Google Docs, OneNote. I'm in central NJ where I generally have a very weak 4G signal (two blocks away it's great - but not at home!), and a mediocre 3G signal. I probably average an hour a day talking on the phone, a couple of dozen SMS and MMS messages, and heavy use of email, Chrome and XDA app. With the stock and 2100 mah batteries, I was running low after about 9 hours of use, even when turning Wi-Fi and BT on and off only for need. With the Hyperion 3500, I can leave everything turned on as mentioned above, enjoy hours of screen on time, leave brightness up, use a live wallpaper (for a change! -- loving "Wave" free), start the day on battery at 5:30am, and still have 30% or 40% left when I plug the phone in at about 11pm.

I was surprised to find that even though the phone is a bit heavier and bulkier, it's not awkward at all with the "hump". I find the grip very comfortable with the 3500 battery and cover. I also got the Trexcell TPU case -- it has cutouts for the buttons, while the Hyperion TPU doesn't -- the Trexcell allows somewhat better tactile feedback as a result. I also got the Seidio extended Convert Combo for this. It's designed for their own extended battery, so the inner cover (the "Seidio Surface") is a very tight fit over the battery door, but it fits well enough and, in fact, fits perfectly after the felt inside the cover squishes down a bit. With all three layers of the Convert Combo installed (Surface, silicone layer, hard shell), the phone is incredibly well protected, looks great, and is actually quite comfortable to hold (disclosure: I have pretty big hands). I LOVE this combo! Between the battery, case and JBSourcery, this is like getting a brand new phone -- and I would seriously be disappointed if I were forced to replace it with pretty much anything else on the market today.

---------- Post added at 12:44 PM ---------- Previous post was at 12:43 PM ----------

Originally Posted by sensation lover

Just making sure before I order this beast, this will work for the GSM model as well won't it?

I think this is the version you need for the GSM model:

http://www.amazon.com/Hyperion-GT-i9...f=pd_sim_cps_5

Received my Hyperion battery for my Gnex and I've got it doing its initial charge. We'll see how it performs.

An advisory for those who have purchased this battery and find that the cover refuses to fit: look at the locking tabs on the side of the cover and compare them with the locking tabs on the stock cover. You will see that there are two tabs missing, and there is one extra tab that is in the wrong place and has nowhere to lock in to. That misplaced tab prevents the cover from clipping in, so just cut that tab off and the cover will fit sufficiently.

Originally Posted by Raven-6

Received my Hyperion battery for my Gnex and I've got it doing its initial charge. We'll see how it performs.

An advisory for those who have purchased this battery and find that the cover refuses to fit: look at the locking tabs on the side of the cover and compare them with the locking tabs on the stock cover. You will see that there are two tabs missing, and there is one extra tab that is in the wrong place and has nowhere to lock in to. That misplaced tab prevents the cover from clipping in, so just cut that tab off and the cover will fit sufficiently.

That's pretty weird actually -- you may want to contact the seller -- Hyperion is very good about checking on your experience and looking for feedback, and will help out. I never noticed an issue such as you describe, and just to be sure after reading your post, I took my Seidio extended Convert Combo off my GNex to take another look. As I remembered, the new Hyperion battery cover was still snapped on perfectly. I popped it out and checked -- and all the tabs on the cover are in exactly the right place, and line up perfectly with the phone body. No issues at all with it not fitting, or not staying snapped closed with all tabs engaged.

BTW: I see it's been about a month since my last post in this thread. I can say that, after having used this new battery every single day, I absolutely love it. Totally changed the way I use the phone -- I no longer worry about turning Wi-Fi on and off all the time or worry about rushing to turn off BT when I'm no longer in my car. I'm not over-cautious about time browsing or using online apps. I get hours a day of screen time, and with that I NEVER run out of power. I start the day with phone off the charger around 5:30am, and I've easily got 30% or more left when I go to sleep around midnight and plug it in again.

Highly recommended.