Where to begin with this little piece of miracle! The battery door that comes with it matches the Galaxy Nexus' color perfectly. The fit is solid and lines up with all OEM fittings and openings. So fit and finish are high quality!
I've never been one concerned with battery life because I am a heavy user. My current stock battery gives me about 1.5 hours of screen on time with 50% brightness in a sketchy 4G area. The Mugen Power battery gave me a whopping average of over 4.5 hours of screen on time with the same settings! With both batteries I used AOKP B40 and Imoseyon Lean Kernel Exp 180mhz. The screenshots speak volumes by themselves!
Before with stock 1850mAh battery:
After with Mugen 3900mAh battery:
Here's a great review by RaulT18 for the GSM 4000mAh battery. The GSM and VZW batteries are essentially the same.
Rules of the Giveaway:
Follow both @DroidForums and @MugenBatteries and tweet this to enter:
Winner will be chosen Sunday night at 8pm MST! So hurry and enter!