6hrs is actually pritty good, the size battery it usess is prolly pritty small.
my guess is thy would if not already make a battery adapter, so u can use 2 batt's instead of just 1.. likea camcorder, so u might get 12hrs.
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only thing i would use it for is games, so 6hrs would be enough, then just recharge it overnight. i of course am not getting one, when 1grand bills start growing outa my ass, then ill get one.