BLADE CX - Larger Capacity Battery?

Just got my Blade CX last week and already have become pretty good at
hovering and turns. I have two (2) of the LiPo batteries, but have
noticed that they seem to be wearing quickly -- getting about 6 minutes
of real power out of each, then only get enough throttle to hover 1-2
feet off the ground.

Anyone know if there is a larger capacity battery available or coming?

Thanks.

Mike
Seattle, WA

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