I'm no fan of VZW, but it's absolutely not true that they don't
support BB devices; my wife has a corporate-assigned Blackberry that
she uses every single day.

If your question is really about BB battery life, it depends vastly on
how much you both talk on the phone and use the Internet functions. On
the latter-model Blackberry devices, things are a little different
because the screens aren't just backlit versions of the home page that
displays all the time anymore. They're now lit up all the time you're
using the device and that lowers the battery life. I can tell you,
however, that with moderate to minimal phone use and pretty heavy
Internet browsing, I get about 3 or 4 days of life on a charge on my
Blackberry 8700g.
** Posted from http://www.teranews.com **