Funtana Hover Video
 

In the logo 10 I use a single pack, it's 4 series, 4 parallel. Still 7800mah, but charges to 16.8V (4.2V per cell in series), and nominal voltage under load is 3.7 per cell,.. i.e. 14.8V, so it's almost 2 volts higher than the 12-cell nimh packs I used, but 7 ounces lighter. I had to go to a slightly milder motor due to the higher voltage increase.