External battery charger? If you are talking Droid RAZR, since the battery is semi-permanent, I don't think so. If you mean a portable charger/booster, I use the Motorola P893.
Sent from my DROID RAZR using Tapatalk with speech to text translation. Please excuse any minor grammatical/punctuation/spelling errors.
I don't know what you consider gigantic, but the Motorola P893 is actually about 20% smaller than the Droid RAZR and is much lighter. It's not really that much bigger (about twice as long) than the battery inside that it runs off of - the same battery used in the OG Droid and D2 (and possibly others that I am not aware of). View attachment 50917 View attachment 50918 View attachment 50916