looks like huge weight savings from this battery.
i assume that the trade-off is in how long the charge is held.

first question - is this true?
second question - are there other trade-offs?
third question - if this is true, how long will it hold a charge (if we're talking no more than 12 hours that's kind of silly, but if it's at least 48 hours...)
fourth question - are there any other benefits?

thanks,

-c