I just ordered a RAZR on ebay to try out in place of my gNex. While I do love my gNex and ICS I just cant take the horrible battery life and signal anymore. Hopefully the RAZR meets my needs....
On the gNex I usually charge once maybe even twice a day and thats only with about 2h of screen on time. My wife has a RAZR and she seems to get about 3.5-4h of screen time off a single charge....does that sound about right?
Verizon swapped my Galaxy Nexus out for a RAZR due to a variety of continuous problems. I find the battery life of the RAZR significantly better than my Galaxy Nexus with the extended battery. Your mileage may vary, of course.
I'd suggest getting an Anker 5500 mh battery/charger for around $40. Even though the added bulk sorta defeats the whole slim and light factor of the Razr, it's nice not to have to be beholden to a wall socket during work hours. I even don't mind holding it behind the Razr as it fits perfectly in the crease of my palm. Since I wear a jacket, I keep the battery in my shirt pocket and the phone in my inside jacket pocket and I usually keep them tethered. If I start my shift with 90%, it stays that way the whole day, or until I decide to untether it (which I do a lot less than I would have thought). It's like using it without ever once worrying about a recharge when I'm on the go, even when I'm away from home for 12 hours, and I use the net A LOT.
Yesterday, I took my phone off the charger at 11 AMish and at midnight, I still had around 15% left. While I was on Wifi 90% of that time, I would say my use was at least moderate, and probably heavy during most of the time I was on 4G.
Keep in mind this is running Eclipse 1.3 and no data-intensive widgets. I used Eclipse 2.0 for a little while on my Charge, and it is simply a great build that tends to give me battery life better than stock. I was still using GO Launcher Ex yesterday, running Google search, Go Calendar, Go Weather, and Go Task Manager widgets. I had all of the auto-updates turned off and did manual updates on the weather widget probably four times.
I tend to get better battery life on ANY launcher besides GO, so I deleted GO and am back on Eclipse launcher that Eclipse 1.3 runs on. I expect to get even better battery life today. I took my phone off the charger roughly three and a half hours ago, and with mild/moderate use, I'm still at 90%.