Well, some of us have moved to a portable charger. Here's a post from the Bionic forums that links back to the Razr forums:
We went through this on the Razr forums. I think we all agree that the New Trent IMP99D or the New Trent IMP1000 are good choices for this.
The 99D is a 9900mAH battery and will charge a Razr 4 and 1/2 times before it needs a charge itself. It has 2 USB ports. One 1 Amp for charging phones and one 2 Amp for charging iPads. (No, you can't charge 2 phones at once because the 2 Amp will fry your phone.) Deron from the Razr forum did a video reviewing this device:
[video=youtube;QSDso84MDh4]http://www.youtube.com/watch?feature=player_embedded&v=QSDso84MDh4[/video]
The 1000 is a 11000mAH battery and I think we've gotten 5 - 6 charges out of it before it needs to be recharged. It only has 1 USB, but it can charge either your phone or your iPad. (I don't know how long or how much to charge your iPad as I don't have an iPad, but I'm looking to get an Android tablet, so we'll see.)
The person who did the video for the 99D also did a review of the Energizer XP4001. It only charged the phone 1 and 1/2 times and couldn't charge an iPad. Here's the videos. He split them in 2:
[video=youtube;7plTnntOXGI]http://www.youtube.com/watch?v=7plTnntOXGI&feature=youtu.be&hd=1[/video]
[video=youtube;VSFkZqM-GWw]http://www.youtube.com/watch?v=VSFkZqM-GWw&feature=youtu.be&hd=1[/video]
The thread over on the Razr forums is long and several devices have been thrown out there, but most come back to the 2 New Trent's above. I don't want to steer you from this site, but if you want to see the other forum posting, it's here:
Taking suggestions for portable backup battery.
As for the two New Trents, Either one is good, it just matters what you want the device to do and charge.