Backup battery charger for my Droid Incredible

[agilpwd]

Going on vacation soon and anticipate using my phone a lot for various apps during the day, while away from any outlet.

I am looking at the Brookstone Quick Charge and the Zagg Sparq. I have looked for thread on this here and not found any info. Sorry if this is a repeat.

At a glance, the Zagg is slightly larger/heavier (will be carrying it in my bag all day) but appears to provide more charge. Would appreciate any actual user input though.

Thanks!